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obtuse
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   obidoxime chloride
         n 1: a chloride used as an antidote for nerve gases such as
               sarin or VX

English Dictionary: obtuse by the DICT Development Group
From WordNet (r) 3.0 (2006) [wn]:
oboe da caccia
n
  1. an alto oboe; precursor of the English horn
From WordNet (r) 3.0 (2006) [wn]:
obtuse
adj
  1. of an angle; between 90 and 180 degrees
    Antonym(s): acute
  2. (of a leaf shape) rounded at the apex
  3. lacking in insight or discernment; "too obtuse to grasp the implications of his behavior"; "a purblind oligarchy that flatly refused to see that history was condemning it to the dustbin"- Jasper Griffin
    Synonym(s): obtuse, purblind
  4. slow to learn or understand; lacking intellectual acuity; "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students"
    Synonym(s): dense, dim, dull, dumb, obtuse, slow
From WordNet (r) 3.0 (2006) [wn]:
obtuse angle
n
  1. an angle between 90 and 180 degrees
From WordNet (r) 3.0 (2006) [wn]:
obtuse leaf
n
  1. a simple leaf having a rounded or blunt tip
From WordNet (r) 3.0 (2006) [wn]:
obtuse triangle
n
  1. a triangle that contains an obtuse interior angle [syn: obtuse triangle, obtuse-angled triangle]
From WordNet (r) 3.0 (2006) [wn]:
obtuse-angled triangle
n
  1. a triangle that contains an obtuse interior angle [syn: obtuse triangle, obtuse-angled triangle]
From WordNet (r) 3.0 (2006) [wn]:
obtusely
adv
  1. in a stupid manner; "he had so rapaciously desired and so obtusely expected to find her alone"
    Synonym(s): dumbly, densely, obtusely
From WordNet (r) 3.0 (2006) [wn]:
obtuseness
n
  1. the quality of being slow to understand [syn: dullness, obtuseness]
  2. the quality of lacking a sharp edge or point
    Antonym(s): acuteness
From WordNet (r) 3.0 (2006) [wn]:
of the essence
adj
  1. of the greatest importance; "the all-important subject of disarmament"; "crucial information"; "in chess cool nerves are of the essence"
    Synonym(s): all-important(a), all important(p), crucial, essential, of the essence(p)
From WordNet (r) 3.0 (2006) [wn]:
off the cuff
adv
  1. without preparation; "the presidential candidate made a remark off the cuff"
From WordNet (r) 3.0 (2006) [wn]:
off the hook
adj
  1. freed from danger or blame or obligation; "I let him off the hook with a mild reprimand"
From WordNet (r) 3.0 (2006) [wn]:
off-the-clock
adv
  1. overtime without extra compensation; "she often has to work off-the-clock"
From WordNet (r) 3.0 (2006) [wn]:
off-the-cuff
adj
  1. with little or no preparation or forethought; "his ad-lib comments showed poor judgment"; "an extemporaneous piano recital"; "an extemporary lecture"; "an extempore skit"; "an impromptu speech"; "offhand excuses"; "trying to sound offhanded and reassuring"; "an off-the-cuff toast"; "a few unrehearsed comments"
    Synonym(s): ad-lib, extemporaneous, extemporary, extempore, impromptu, offhand, offhanded, off-the-cuff, unrehearsed
From WordNet (r) 3.0 (2006) [wn]:
off-the-shelf
adj
  1. (especially of clothing) made in standard sizes and available from merchandise in stock; "a ready-made jacket"; "ready-to-wear clothes"
    Synonym(s): off-the-rack, off-the-shelf, off-the-peg, ready-to-wear
From WordNet (r) 3.0 (2006) [wn]:
off-the-shoulder
adj
  1. not covering the shoulders (especially in the case of a blouse or dress)
From WordNet (r) 3.0 (2006) [wn]:
ophidism
n
  1. poisoning by snake venom
From WordNet (r) 3.0 (2006) [wn]:
Optez
n
  1. an artificial language
From WordNet (r) 3.0 (2006) [wn]:
optic
adj
  1. of or relating to or resembling the eye; "ocular muscles"; "an ocular organ"; "ocular diseases"; "the optic (or optical) axis of the eye"; "an ocular spot is a pigmented organ or part believed to be sensitive to light"
    Synonym(s): ocular, optic, optical, opthalmic
  2. relating to or using sight; "ocular inspection"; "an optical illusion"; "visual powers"; "visual navigation"
    Synonym(s): ocular, optic, optical, visual
n
  1. the organ of sight
    Synonym(s): eye, oculus, optic
From WordNet (r) 3.0 (2006) [wn]:
optic axis
n
  1. in a doubly refracting crystal, the line in the direction of which no double refraction occurs; "a crystal may have either one or two optic axes"
  2. a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted; "in a normal eye the optic axis is the direction in which objects are seen most distinctly"
    Synonym(s): principal axis, optic axis
From WordNet (r) 3.0 (2006) [wn]:
optic chiasm
n
  1. the crossing of the optic nerves from the two eyes at the base of the brain
    Synonym(s): optic chiasma, optic chiasm, chiasma opticum
From WordNet (r) 3.0 (2006) [wn]:
optic chiasma
n
  1. the crossing of the optic nerves from the two eyes at the base of the brain
    Synonym(s): optic chiasma, optic chiasm, chiasma opticum
From WordNet (r) 3.0 (2006) [wn]:
optic cup
n
  1. (embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina
    Synonym(s): optic cup, eyecup
From WordNet (r) 3.0 (2006) [wn]:
optic disc
n
  1. the point where the optic nerve enters the retina; not sensitive to light
    Synonym(s): blind spot, optic disc, optic disk
From WordNet (r) 3.0 (2006) [wn]:
optic disk
n
  1. the point where the optic nerve enters the retina; not sensitive to light
    Synonym(s): blind spot, optic disc, optic disk
From WordNet (r) 3.0 (2006) [wn]:
optic nerve
n
  1. the cranial nerve that serves the retina [syn: {optic nerve}, nervus opticus, second cranial nerve, optic tract]
From WordNet (r) 3.0 (2006) [wn]:
optic radiation
n
  1. a nerve pathway from the lateral geniculate body to the visual cortex
    Synonym(s): optic radiation, radiatio optica
From WordNet (r) 3.0 (2006) [wn]:
optic tract
n
  1. the cranial nerve that serves the retina [syn: {optic nerve}, nervus opticus, second cranial nerve, optic tract]
From WordNet (r) 3.0 (2006) [wn]:
optical
adj
  1. of or relating to or involving light or optics; "optical supplies"
  2. relating to or using sight; "ocular inspection"; "an optical illusion"; "visual powers"; "visual navigation"
    Synonym(s): ocular, optic, optical, visual
  3. of or relating to or resembling the eye; "ocular muscles"; "an ocular organ"; "ocular diseases"; "the optic (or optical) axis of the eye"; "an ocular spot is a pigmented organ or part believed to be sensitive to light"
    Synonym(s): ocular, optic, optical, opthalmic
From WordNet (r) 3.0 (2006) [wn]:
optical aberration
n
  1. an optical phenomenon resulting from the failure of a lens or mirror to produce a good image
    Synonym(s): aberration, distortion, optical aberration
From WordNet (r) 3.0 (2006) [wn]:
optical bench
n
  1. apparatus for observation and measurement of optical phenomena
From WordNet (r) 3.0 (2006) [wn]:
optical condenser
n
  1. lens used to concentrate light on an object [syn: condenser, optical condenser]
From WordNet (r) 3.0 (2006) [wn]:
optical crown
n
  1. optical glass of low dispersion and low refractive index
    Synonym(s): optical crown, crown glass, optical crown glass
From WordNet (r) 3.0 (2006) [wn]:
optical crown glass
n
  1. optical glass of low dispersion and low refractive index
    Synonym(s): optical crown, crown glass, optical crown glass
From WordNet (r) 3.0 (2006) [wn]:
optical density
n
  1. (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation
    Synonym(s): optical density, transmission density, photographic density, absorbance
From WordNet (r) 3.0 (2006) [wn]:
optical device
n
  1. a device for producing or controlling light
From WordNet (r) 3.0 (2006) [wn]:
optical disc
n
  1. a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface
    Synonym(s): optical disk, optical disc
From WordNet (r) 3.0 (2006) [wn]:
optical disk
n
  1. a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface
    Synonym(s): optical disk, optical disc
From WordNet (r) 3.0 (2006) [wn]:
optical fiber
n
  1. a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images
    Synonym(s): optical fiber, glass fiber, optical fibre, glass fibre
From WordNet (r) 3.0 (2006) [wn]:
optical fibre
n
  1. a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images
    Synonym(s): optical fiber, glass fiber, optical fibre, glass fibre
From WordNet (r) 3.0 (2006) [wn]:
optical flint
n
  1. optical glass of high dispersion and high refractive index
    Synonym(s): optical flint, flint glass
From WordNet (r) 3.0 (2006) [wn]:
optical fusion
n
  1. the combining of images from the two eyes to form a single visual percept
    Synonym(s): fusion, optical fusion
From WordNet (r) 3.0 (2006) [wn]:
optical glass
n
  1. clear homogeneous glass of known refractive index; used to make lenses
From WordNet (r) 3.0 (2006) [wn]:
optical illusion
n
  1. an optical phenomenon that results in a false or deceptive visual impression
From WordNet (r) 3.0 (2006) [wn]:
optical instrument
n
  1. an instrument designed to aid vision
From WordNet (r) 3.0 (2006) [wn]:
optical lens
n
  1. a lens that focuses the image in a camera [syn: {camera lens}, optical lens]
From WordNet (r) 3.0 (2006) [wn]:
optical maser
n
  1. an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light
    Synonym(s): laser, optical maser
From WordNet (r) 3.0 (2006) [wn]:
optical opacity
n
  1. opacity to light
From WordNet (r) 3.0 (2006) [wn]:
optical phenomenon
n
  1. a physical phenomenon related to or involving light
From WordNet (r) 3.0 (2006) [wn]:
optical prism
n
  1. optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image
    Synonym(s): prism, optical prism
From WordNet (r) 3.0 (2006) [wn]:
optical pyrometer
n
  1. a pyrometer that uses the color of the light emitted by a hot object
    Synonym(s): optical pyrometer, pyroscope
From WordNet (r) 3.0 (2006) [wn]:
optical telescope
n
  1. an astronomical telescope designed to collect and record light from cosmic sources
From WordNet (r) 3.0 (2006) [wn]:
optically
adv
  1. in an optical manner; "optically distorted"
From WordNet (r) 3.0 (2006) [wn]:
optician
n
  1. a worker who makes glasses for remedying defects of vision
    Synonym(s): optician, lens maker
From WordNet (r) 3.0 (2006) [wn]:
optics
n
  1. the branch of physics that studies the physical properties of light
  2. optical properties; "the optics of a telescope"
From WordNet (r) 3.0 (2006) [wn]:
oviduct
n
  1. either of a pair of tubes conducting the egg from the ovary to the uterus
    Synonym(s): Fallopian tube, uterine tube, oviduct
From WordNet (r) 3.0 (2006) [wn]:
ovotestis
n
  1. hermaphroditic gonad that contains both testicular and ovarian tissue
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   O94phytic \O`[94]*phyt"ic\, a. (Bot.)
      Of or pertaining to an o[94]phyte.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obduce \Ob*duce"\, v. t. [L. obducere, obductum; ob (see Ob-) +
      ducere to lead.]
      To draw over, as a covering. [Obs.] --Sir M. Hale.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obduct \Ob*duct"\, v. t. [See {Obduce}.]
      To draw over; to cover. [Obs.] --Sir T. Browne.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obduction \Ob*duc"tion\, n. [L. obductio.]
      The act of drawing or laying over, as a covering. [Obs.]

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtected \Ob*tect"ed\, a. [L. obtectus, p. p. of obtegere to
      cover over.]
      1. Covered; protected. [Obs.]
  
      2. (Zo[94]l.) Covered with a hard chitinous case, as the pupa
            of certain files.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Pupa \Pu"pa\, n.; pl. L. {Pup[?]}, E. {Pupas}. [L. pupa girl.
      doll, puppet, fem. of pupus. Cf. {Puppet}.]
      1. (Zo[94]l.) Any insect in that stage of its metamorphosis
            which usually immediately precedes the adult, or imago,
            stage.
  
      Note: Among insects belonging to the higher orders, as the
               Hymenoptera, Diptera, Lepidoptera, the pupa is inactive
               and takes no food; in the lower orders it is active and
               takes food, and differs little from the imago except in
               the rudimentary state of the sexual organs, and of the
               wings in those that have wings when adult. The term
               pupa is sometimes applied to other invertebrates in
               analogous stages of development.
  
      2. (Zo[94]l.) A genus of air-breathing land snails having an
            elongated spiral shell.
  
      {Coarctate}, [or] {Obtected}, {pupa}, a pupa which is incased
            in the dried-up skin of the larva, as in many Diptera.
  
      {Masked pupa}, a pupa whose limbs are bound down and partly
            concealed by a chitinous covering, as in Lepidoptera.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtest \Ob*test"\, v. t. [imp. & p. p. {Obtested}; p. pr. & vb.
      n. {Obtesting}.] [L. obtestari; ob (see {Ob-}) + testari to
      witness, fr. testis a witness.]
      1. To call to witness; to invoke as a witness. [R.] --Dryden.
  
      2. To beseech; to supplicate; to beg for. [R.]

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtest \Ob*test"\, v. i.
      To protest. [R.] --E. Waterhouse.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtestation \Ob`tes*ta"tion\, n. [L. obtestatio.]
      The act of obtesting; supplication; protestation. [R.]
  
               Antonio asserted this with great obtestation. --Evelyn.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtest \Ob*test"\, v. t. [imp. & p. p. {Obtested}; p. pr. & vb.
      n. {Obtesting}.] [L. obtestari; ob (see {Ob-}) + testari to
      witness, fr. testis a witness.]
      1. To call to witness; to invoke as a witness. [R.] --Dryden.
  
      2. To beseech; to supplicate; to beg for. [R.]

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtest \Ob*test"\, v. t. [imp. & p. p. {Obtested}; p. pr. & vb.
      n. {Obtesting}.] [L. obtestari; ob (see {Ob-}) + testari to
      witness, fr. testis a witness.]
      1. To call to witness; to invoke as a witness. [R.] --Dryden.
  
      2. To beseech; to supplicate; to beg for. [R.]

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtusangular \Ob*tus"an`gu*lar\, a.
      See {Obstuseangular}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtuse \Ob*tuse"\ a. [Compar. {Obtuser}; superl. {Obtusest}.]
      [L. obtusus, p. p. of obtundere to blunt: cf. F. obtus. See
      {Obtund}.]
      1. Not pointed or acute; blunt; -- applied esp. to angles
            greater than a right angle, or containing more than ninety
            degrees.
  
      2. Not having acute sensibility or perceptions; dull; stupid;
            as, obtuse senses. --Milton.
  
      3. Dull; deadened; as, obtuse sound. --Johnson.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Angle \An"gle\ ([acr][nsm]"g'l), n. [F. angle, L. angulus angle,
      corner; akin to uncus hook, Gr. 'agky`los bent, crooked,
      angular, 'a`gkos a bend or hollow, AS. angel hook, fish-hook,
      G. angel, and F. anchor.]
      1. The inclosed space near the point where two lines meet; a
            corner; a nook.
  
                     Into the utmost angle of the world.   --Spenser.
  
                     To search the tenderest angles of the heart.
                                                                              --Milton.
  
      2. (Geom.)
            (a) The figure made by. two lines which meet.
            (b) The difference of direction of two lines. In the lines
                  meet, the point of meeting is the vertex of the angle.
  
      3. A projecting or sharp corner; an angular fragment.
  
                     Though but an angle reached him of the stone.
                                                                              --Dryden.
  
      4. (Astrol.) A name given to four of the twelve astrological
            [bd]houses.[b8] [Obs.] --Chaucer.
  
      5. [AS. angel.] A fishhook; tackle for catching fish,
            consisting of a line, hook, and bait, with or without a
            rod.
  
                     Give me mine angle: we 'll to the river there.
                                                                              --Shak.
  
                     A fisher next his trembling angle bears. --Pope.
  
      {Acute angle}, one less than a right angle, or less than
            90[deg].
  
      {Adjacent} or {Contiguous angles}, such as have one leg
            common to both angles.
  
      {Alternate angles}. See {Alternate}.
  
      {Angle bar}.
            (a) (Carp.) An upright bar at the angle where two faces of
                  a polygonal or bay window meet. --Knight.
            (b) (Mach.) Same as {Angle iron}.
  
      {Angle bead} (Arch.), a bead worked on or fixed to the angle
            of any architectural work, esp. for protecting an angle of
            a wall.
  
      {Angle brace}, {Angle tie} (Carp.), a brace across an
            interior angle of a wooden frame, forming the hypothenuse
            and securing the two side pieces together. --Knight.
  
      {Angle iron} (Mach.), a rolled bar or plate of iron having
            one or more angles, used for forming the corners, or
            connecting or sustaining the sides of an iron structure to
            which it is riveted.
  
      {Angle leaf} (Arch.), a detail in the form of a leaf, more or
            less conventionalized, used to decorate and sometimes to
            strengthen an angle.
  
      {Angle meter}, an instrument for measuring angles, esp. for
            ascertaining the dip of strata.
  
      {Angle shaft} (Arch.), an enriched angle bead, often having a
            capital or base, or both.
  
      {Curvilineal angle}, one formed by two curved lines.
  
      {External angles}, angles formed by the sides of any
            right-lined figure, when the sides are produced or
            lengthened.
  
      {Facial angle}. See under {Facial}.
  
      {Internal angles}, those which are within any right-lined
            figure.
  
      {Mixtilineal angle}, one formed by a right line with a curved
            line.
  
      {Oblique angle}, one acute or obtuse, in opposition to a
            right angle.
  
      {Obtuse angle}, one greater than a right angle, or more than
            90[deg].
  
      {Optic angle}. See under {Optic}.
  
      {Rectilineal} or {Right-lined angle}, one formed by two right
            lines.
  
      {Right angle}, one formed by a right line falling on another
            perpendicularly, or an angle of 90[deg] (measured by a
            quarter circle).
  
      {Solid angle}, the figure formed by the meeting of three or
            more plane angles at one point.
  
      {Spherical angle}, one made by the meeting of two arcs of
            great circles, which mutually cut one another on the
            surface of a globe or sphere.
  
      {Visual angle}, the angle formed by two rays of light, or two
            straight lines drawn from the extreme points of an object
            to the center of the eye.
  
      {For Angles of commutation}, {draught}, {incidence},
      {reflection}, {refraction}, {position}, {repose}, {fraction},
            see {Commutation}, {Draught}, {Incidence}, {Reflection},
            {Refraction}, etc.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtuse-angled \Ob*tuse"-an`gled\, obtuse-angular
   \ob*tuse"-an`gu*lar\, a.
      Having an obtuse angle; as, an obtuse-angled triangle.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtuse-angled \Ob*tuse"-an`gled\, obtuse-angular
   \ob*tuse"-an`gu*lar\, a.
      Having an obtuse angle; as, an obtuse-angled triangle.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtusely \Ob*tuse"ly\, adv.
      In an obtuse manner.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtuseness \Ob*tuse"ness\, n.
      State or quality of being obtuse.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtuse \Ob*tuse"\ a. [Compar. {Obtuser}; superl. {Obtusest}.]
      [L. obtusus, p. p. of obtundere to blunt: cf. F. obtus. See
      {Obtund}.]
      1. Not pointed or acute; blunt; -- applied esp. to angles
            greater than a right angle, or containing more than ninety
            degrees.
  
      2. Not having acute sensibility or perceptions; dull; stupid;
            as, obtuse senses. --Milton.
  
      3. Dull; deadened; as, obtuse sound. --Johnson.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtuse \Ob*tuse"\ a. [Compar. {Obtuser}; superl. {Obtusest}.]
      [L. obtusus, p. p. of obtundere to blunt: cf. F. obtus. See
      {Obtund}.]
      1. Not pointed or acute; blunt; -- applied esp. to angles
            greater than a right angle, or containing more than ninety
            degrees.
  
      2. Not having acute sensibility or perceptions; dull; stupid;
            as, obtuse senses. --Milton.
  
      3. Dull; deadened; as, obtuse sound. --Johnson.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtusion \Ob*tu"sion\, n. [L. obtusio, from obtundere to blunt.
      See {Obtund}.]
      1. The act or process of making obtuse or blunt.
  
      2. The state of being dulled or blunted; as, the obtusion of
            the senses. --Harvey.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Obtusity \Ob*tu"si*ty\, n.
      Obtuseness. --Lond. Quart. Rev.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Equator \E*qua"tor\, n. [L. aequator one who equalizes: cf. F.
      [82]quateur equator. See {Equate}.]
      1. (Geog.) The imaginary great circle on the earth's surface,
            everywhere equally distant from the two poles, and
            dividing the earth's surface into two hemispheres.
  
      2. (Astron.) The great circle of the celestial sphere,
            coincident with the plane of the earth's equator; -- so
            called because when the sun is in it, the days and nights
            are of equal length; hence called also the {equinoctial},
            and on maps, globes, etc., the {equinoctial line}.
  
      {Equator} {of the sun [or] of a planet} (Astron.), the great
            circle whose plane passes through through the center of
            the body, and is perpendicular to its axis of revolution.
           
  
      {Magnetic equator}. See {Aclinic}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Hook \Hook\, n. [OE. hok, AS. h[d3]c; cf. D. haak, G. hake,
      haken, OHG. h[be]ko, h[be]go, h[be]ggo, Icel. haki, Sw. hake,
      Dan. hage. Cf. {Arquebuse}, {Hagbut}, {Hake}, {Hatch} a half
      door, {Heckle}.]
      1. A piece of metal, or other hard material, formed or bent
            into a curve or at an angle, for catching, holding, or
            sustaining anything; as, a hook for catching fish; a hook
            for fastening a gate; a boat hook, etc.
  
      2. That part of a hinge which is fixed to a post, and on
            which a door or gate hangs and turns.
  
      3. An implement for cutting grass or grain; a sickle; an
            instrument for cutting or lopping; a billhook.
  
                     Like slashing Bentley with his desperate hook.
                                                                              --Pope.
  
      4. (Steam Engin.) See {Eccentric}, and {V-hook}.
  
      5. A snare; a trap. [R.] --Shak.
  
      6. A field sown two years in succession. [Prov. Eng.]
  
      7. pl. The projecting points of the thigh bones of cattle; --
            called also {hook bones}.
  
      {By hook or by crook}, one way or other; by any means, direct
            or indirect. --Milton. [bd]In hope her to attain by hook
            or crook.[b8] --Spenser.
  
      {Off the hooks}, unhinged; disturbed; disordered. [Colloq.]
            [bd]In the evening, by water, to the Duke of Albemarle,
            whom I found mightly off the hooks that the ships are not
            gone out of the river.[b8] --Pepys.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Offtake \Off"take`\, n. [Off + take.]
      1. Act of taking off; specif., the taking off or purchase of
            goods.
  
      2. Something taken off; a deduction.
  
      3. A channel for taking away air or water; also, the point of
            beginning of such a channel; a take-off.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Opeidoscope \O*pei"do*scope\, n. [Gr. [?], [?], voice + [?] form
      + -scope.] (Physics)
      An instrument, consisting of a tube having one end open and
      the other end covered with a thin flexible membrance to the
      center of which is attached a small mirror. It is used for
      exhibiting upon a screen, by means of rays reflected from the
      mirror, the vibratory motions caused by sounds produced at
      the open end of the tube, as by speaking or singing into it.
      --A. E. Dolbear.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Ophidious \O*phid"i*ous\, a.
      Ophidian.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optic \Op"tic\, n. [From {Optic}, a.]
      1. The organ of sight; an eye.
  
                     The difference is as great between The optics
                     seeing, as the object seen.               --Pope.
  
      2. An eyeglass. [Obs.] --Herbert.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optic \Op"tic\, Optical \Op"tic*al\, a. [F. optique, Gr. [?];
      akin to [?] sight, [?] I have seen, [?] I shall see, and to
      [?] the two eyes, [?] face, L. oculus eye. See {Ocular},
      {Eye}, and cf. {Canopy}, {Ophthalmia}.]
      1. Of or pertaining to vision or sight.
  
                     The moon, whose orb Through optic glass the Tuscan
                     artist views.                                    --Milton.
  
      2. Of or pertaining to the eye; ocular; as, the optic nerves
            (the first pair of cranial nerves) which are distributed
            to the retina. See Illust. of {Brain}, and {Eye}.
  
      3. Relating to the science of optics; as, optical works.
  
      {Optic angle} (Opt.), the angle included between the optic
            axes of the two eyes when directed to the same point; --
            sometimes called {binocular parallax}.
  
      {Optic axis}. (Opt.)
            (a) A line drawn through the center of the eye
                  perpendicular to its anterior and posterior surfaces.
                  In a normal eye it is in the direction of the optic
                  axis that objects are most distinctly seen.
            (b) The line in a doubly refracting crystal, in the
                  direction of which no double refraction occurs. A
                  uniaxial crystal has one such line, a biaxial crystal
                  has two.
  
      {Optical circle} (Opt.), a graduated circle used for the
            measurement of angles in optical experiments.
  
      {Optical square}, a surveyor's instrument with reflectors for
            laying off right angles.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optic \Op"tic\, Optical \Op"tic*al\, a. [F. optique, Gr. [?];
      akin to [?] sight, [?] I have seen, [?] I shall see, and to
      [?] the two eyes, [?] face, L. oculus eye. See {Ocular},
      {Eye}, and cf. {Canopy}, {Ophthalmia}.]
      1. Of or pertaining to vision or sight.
  
                     The moon, whose orb Through optic glass the Tuscan
                     artist views.                                    --Milton.
  
      2. Of or pertaining to the eye; ocular; as, the optic nerves
            (the first pair of cranial nerves) which are distributed
            to the retina. See Illust. of {Brain}, and {Eye}.
  
      3. Relating to the science of optics; as, optical works.
  
      {Optic angle} (Opt.), the angle included between the optic
            axes of the two eyes when directed to the same point; --
            sometimes called {binocular parallax}.
  
      {Optic axis}. (Opt.)
            (a) A line drawn through the center of the eye
                  perpendicular to its anterior and posterior surfaces.
                  In a normal eye it is in the direction of the optic
                  axis that objects are most distinctly seen.
            (b) The line in a doubly refracting crystal, in the
                  direction of which no double refraction occurs. A
                  uniaxial crystal has one such line, a biaxial crystal
                  has two.
  
      {Optical circle} (Opt.), a graduated circle used for the
            measurement of angles in optical experiments.
  
      {Optical square}, a surveyor's instrument with reflectors for
            laying off right angles.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Angle \An"gle\ ([acr][nsm]"g'l), n. [F. angle, L. angulus angle,
      corner; akin to uncus hook, Gr. 'agky`los bent, crooked,
      angular, 'a`gkos a bend or hollow, AS. angel hook, fish-hook,
      G. angel, and F. anchor.]
      1. The inclosed space near the point where two lines meet; a
            corner; a nook.
  
                     Into the utmost angle of the world.   --Spenser.
  
                     To search the tenderest angles of the heart.
                                                                              --Milton.
  
      2. (Geom.)
            (a) The figure made by. two lines which meet.
            (b) The difference of direction of two lines. In the lines
                  meet, the point of meeting is the vertex of the angle.
  
      3. A projecting or sharp corner; an angular fragment.
  
                     Though but an angle reached him of the stone.
                                                                              --Dryden.
  
      4. (Astrol.) A name given to four of the twelve astrological
            [bd]houses.[b8] [Obs.] --Chaucer.
  
      5. [AS. angel.] A fishhook; tackle for catching fish,
            consisting of a line, hook, and bait, with or without a
            rod.
  
                     Give me mine angle: we 'll to the river there.
                                                                              --Shak.
  
                     A fisher next his trembling angle bears. --Pope.
  
      {Acute angle}, one less than a right angle, or less than
            90[deg].
  
      {Adjacent} or {Contiguous angles}, such as have one leg
            common to both angles.
  
      {Alternate angles}. See {Alternate}.
  
      {Angle bar}.
            (a) (Carp.) An upright bar at the angle where two faces of
                  a polygonal or bay window meet. --Knight.
            (b) (Mach.) Same as {Angle iron}.
  
      {Angle bead} (Arch.), a bead worked on or fixed to the angle
            of any architectural work, esp. for protecting an angle of
            a wall.
  
      {Angle brace}, {Angle tie} (Carp.), a brace across an
            interior angle of a wooden frame, forming the hypothenuse
            and securing the two side pieces together. --Knight.
  
      {Angle iron} (Mach.), a rolled bar or plate of iron having
            one or more angles, used for forming the corners, or
            connecting or sustaining the sides of an iron structure to
            which it is riveted.
  
      {Angle leaf} (Arch.), a detail in the form of a leaf, more or
            less conventionalized, used to decorate and sometimes to
            strengthen an angle.
  
      {Angle meter}, an instrument for measuring angles, esp. for
            ascertaining the dip of strata.
  
      {Angle shaft} (Arch.), an enriched angle bead, often having a
            capital or base, or both.
  
      {Curvilineal angle}, one formed by two curved lines.
  
      {External angles}, angles formed by the sides of any
            right-lined figure, when the sides are produced or
            lengthened.
  
      {Facial angle}. See under {Facial}.
  
      {Internal angles}, those which are within any right-lined
            figure.
  
      {Mixtilineal angle}, one formed by a right line with a curved
            line.
  
      {Oblique angle}, one acute or obtuse, in opposition to a
            right angle.
  
      {Obtuse angle}, one greater than a right angle, or more than
            90[deg].
  
      {Optic angle}. See under {Optic}.
  
      {Rectilineal} or {Right-lined angle}, one formed by two right
            lines.
  
      {Right angle}, one formed by a right line falling on another
            perpendicularly, or an angle of 90[deg] (measured by a
            quarter circle).
  
      {Solid angle}, the figure formed by the meeting of three or
            more plane angles at one point.
  
      {Spherical angle}, one made by the meeting of two arcs of
            great circles, which mutually cut one another on the
            surface of a globe or sphere.
  
      {Visual angle}, the angle formed by two rays of light, or two
            straight lines drawn from the extreme points of an object
            to the center of the eye.
  
      {For Angles of commutation}, {draught}, {incidence},
      {reflection}, {refraction}, {position}, {repose}, {fraction},
            see {Commutation}, {Draught}, {Incidence}, {Reflection},
            {Refraction}, etc.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optic \Op"tic\, Optical \Op"tic*al\, a. [F. optique, Gr. [?];
      akin to [?] sight, [?] I have seen, [?] I shall see, and to
      [?] the two eyes, [?] face, L. oculus eye. See {Ocular},
      {Eye}, and cf. {Canopy}, {Ophthalmia}.]
      1. Of or pertaining to vision or sight.
  
                     The moon, whose orb Through optic glass the Tuscan
                     artist views.                                    --Milton.
  
      2. Of or pertaining to the eye; ocular; as, the optic nerves
            (the first pair of cranial nerves) which are distributed
            to the retina. See Illust. of {Brain}, and {Eye}.
  
      3. Relating to the science of optics; as, optical works.
  
      {Optic angle} (Opt.), the angle included between the optic
            axes of the two eyes when directed to the same point; --
            sometimes called {binocular parallax}.
  
      {Optic axis}. (Opt.)
            (a) A line drawn through the center of the eye
                  perpendicular to its anterior and posterior surfaces.
                  In a normal eye it is in the direction of the optic
                  axis that objects are most distinctly seen.
            (b) The line in a doubly refracting crystal, in the
                  direction of which no double refraction occurs. A
                  uniaxial crystal has one such line, a biaxial crystal
                  has two.
  
      {Optical circle} (Opt.), a graduated circle used for the
            measurement of angles in optical experiments.
  
      {Optical square}, a surveyor's instrument with reflectors for
            laying off right angles.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Axis \Ax"is\, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.]
      A straight line, real or imaginary, passing through a body,
      on which it revolves, or may be supposed to revolve; a line
      passing through a body or system around which the parts are
      symmetrically arranged.
  
      2. (Math.) A straight line with respect to which the
            different parts of a magnitude are symmetrically arranged;
            as, the axis of a cylinder, i. e., the axis of a cone,
            that is, the straight line joining the vertex and the
            center of the base; the axis of a circle, any straight
            line passing through the center.
  
      3. (Bot.) The stem; the central part, or longitudinal
            support, on which organs or parts are arranged; the
            central line of any body. --Gray.
  
      4. (Anat.)
            (a) The second vertebra of the neck, or {vertebra
                  dentata}.
            (b) Also used of the body only of the vertebra, which is
                  prolonged anteriorly within the foramen of the first
                  vertebra or atlas, so as to form the odontoid process
                  or peg which serves as a pivot for the atlas and head
                  to turn upon.
  
      5. (Crystallog.) One of several imaginary lines, assumed in
            describing the position of the planes by which a crystal
            is bounded.
  
      6. (Fine Arts) The primary or secondary central line of any
            design.
  
      {Anticlinal axis} (Geol.), a line or ridge from which the
            strata slope downward on the two opposite sides.
  
      {Synclinal axis}, a line from which the strata slope upward
            in opposite directions, so as to form a valley.
  
      {Axis cylinder} (Anat.), the neuraxis or essential, central
            substance of a nerve fiber; -- called also {axis band},
            {axial fiber}, and {cylinder axis}.
  
      {Axis in peritrochio}, the wheel and axle, one of the
            mechanical powers.
  
      {Axis of a curve} (Geom.), a straight line which bisects a
            system of parallel chords of a curve; called a {principal
            axis}, when cutting them at right angles, in which case it
            divides the curve into two symmetrical portions, as in the
            parabola, which has one such axis, the ellipse, which has
            two, or the circle, which has an infinite number. The two
            axes of the ellipse are the {major axis} and the {minor
            axis}, and the two axes of the hyperbola are the
            {transverse axis} and the {conjugate axis}.
  
      {Axis of a lens}, the straight line passing through its
            center and perpendicular to its surfaces.
  
      {Axis of a} {telescope [or] microscope}, the straight line
            with which coincide the axes of the several lenses which
            compose it.
  
      {Axes of co[94]rdinates in a plane}, two straight lines
            intersecting each other, to which points are referred for
            the purpose of determining their relative position: they
            are either rectangular or oblique.
  
      {Axes of co[94]rdinates in space}, the three straight lines
            in which the co[94]rdinate planes intersect each other.
  
      {Axis of a balance}, that line about which it turns.
  
      {Axis of oscillation}, of a pendulum, a right line passing
            through the center about which it vibrates, and
            perpendicular to the plane of vibration.
  
      {Axis of polarization}, the central line around which the
            prismatic rings or curves are arranged. --Brewster.
  
      {Axis of revolution} (Descriptive Geom.), a straight line
            about which some line or plane is revolved, so that the
            several points of the line or plane shall describe circles
            with their centers in the fixed line, and their planes
            perpendicular to it, the line describing a surface of
            revolution, and the plane a solid of revolution.
  
      {Axis of symmetry} (Geom.), any line in a plane figure which
            divides the figure into two such parts that one part, when
            folded over along the axis, shall coincide with the other
            part.
  
      {Axis of the} {equator, ecliptic, horizon} (or other circle
            considered with reference to the sphere on which it lies),
            the diameter of the sphere which is perpendicular to the
            plane of the circle. --Hutton.
  
      {Axis of the Ionic capital} (Arch.), a line passing
            perpendicularly through the middle of the eye of the
            volute.
  
      {Neutral axis} (Mech.), the line of demarcation between the
            horizontal elastic forces of tension and compression,
            exerted by the fibers in any cross section of a girder.
  
      {Optic axis of a crystal}, the direction in which a ray of
            transmitted light suffers no double refraction. All
            crystals, not of the isometric system, are either uniaxial
            or biaxial.
  
      {Optic axis}, {Visual axis} (Opt.), the straight line passing
            through the center of the pupil, and perpendicular to the
            surface of the eye.
  
      {Radical axis of two circles} (Geom.), the straight line
            perpendicular to the line joining their centers and such
            that the tangents from any point of it to the two circles
            shall be equal to each other.
  
      {Spiral axis} (Arch.), the axis of a twisted column drawn
            spirally in order to trace the circumvolutions without.
  
      {Axis of abscissas} and {Axis of ordinates}. See {Abscissa}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Axis \Ax"is\, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.]
      A straight line, real or imaginary, passing through a body,
      on which it revolves, or may be supposed to revolve; a line
      passing through a body or system around which the parts are
      symmetrically arranged.
  
      2. (Math.) A straight line with respect to which the
            different parts of a magnitude are symmetrically arranged;
            as, the axis of a cylinder, i. e., the axis of a cone,
            that is, the straight line joining the vertex and the
            center of the base; the axis of a circle, any straight
            line passing through the center.
  
      3. (Bot.) The stem; the central part, or longitudinal
            support, on which organs or parts are arranged; the
            central line of any body. --Gray.
  
      4. (Anat.)
            (a) The second vertebra of the neck, or {vertebra
                  dentata}.
            (b) Also used of the body only of the vertebra, which is
                  prolonged anteriorly within the foramen of the first
                  vertebra or atlas, so as to form the odontoid process
                  or peg which serves as a pivot for the atlas and head
                  to turn upon.
  
      5. (Crystallog.) One of several imaginary lines, assumed in
            describing the position of the planes by which a crystal
            is bounded.
  
      6. (Fine Arts) The primary or secondary central line of any
            design.
  
      {Anticlinal axis} (Geol.), a line or ridge from which the
            strata slope downward on the two opposite sides.
  
      {Synclinal axis}, a line from which the strata slope upward
            in opposite directions, so as to form a valley.
  
      {Axis cylinder} (Anat.), the neuraxis or essential, central
            substance of a nerve fiber; -- called also {axis band},
            {axial fiber}, and {cylinder axis}.
  
      {Axis in peritrochio}, the wheel and axle, one of the
            mechanical powers.
  
      {Axis of a curve} (Geom.), a straight line which bisects a
            system of parallel chords of a curve; called a {principal
            axis}, when cutting them at right angles, in which case it
            divides the curve into two symmetrical portions, as in the
            parabola, which has one such axis, the ellipse, which has
            two, or the circle, which has an infinite number. The two
            axes of the ellipse are the {major axis} and the {minor
            axis}, and the two axes of the hyperbola are the
            {transverse axis} and the {conjugate axis}.
  
      {Axis of a lens}, the straight line passing through its
            center and perpendicular to its surfaces.
  
      {Axis of a} {telescope [or] microscope}, the straight line
            with which coincide the axes of the several lenses which
            compose it.
  
      {Axes of co[94]rdinates in a plane}, two straight lines
            intersecting each other, to which points are referred for
            the purpose of determining their relative position: they
            are either rectangular or oblique.
  
      {Axes of co[94]rdinates in space}, the three straight lines
            in which the co[94]rdinate planes intersect each other.
  
      {Axis of a balance}, that line about which it turns.
  
      {Axis of oscillation}, of a pendulum, a right line passing
            through the center about which it vibrates, and
            perpendicular to the plane of vibration.
  
      {Axis of polarization}, the central line around which the
            prismatic rings or curves are arranged. --Brewster.
  
      {Axis of revolution} (Descriptive Geom.), a straight line
            about which some line or plane is revolved, so that the
            several points of the line or plane shall describe circles
            with their centers in the fixed line, and their planes
            perpendicular to it, the line describing a surface of
            revolution, and the plane a solid of revolution.
  
      {Axis of symmetry} (Geom.), any line in a plane figure which
            divides the figure into two such parts that one part, when
            folded over along the axis, shall coincide with the other
            part.
  
      {Axis of the} {equator, ecliptic, horizon} (or other circle
            considered with reference to the sphere on which it lies),
            the diameter of the sphere which is perpendicular to the
            plane of the circle. --Hutton.
  
      {Axis of the Ionic capital} (Arch.), a line passing
            perpendicularly through the middle of the eye of the
            volute.
  
      {Neutral axis} (Mech.), the line of demarcation between the
            horizontal elastic forces of tension and compression,
            exerted by the fibers in any cross section of a girder.
  
      {Optic axis of a crystal}, the direction in which a ray of
            transmitted light suffers no double refraction. All
            crystals, not of the isometric system, are either uniaxial
            or biaxial.
  
      {Optic axis}, {Visual axis} (Opt.), the straight line passing
            through the center of the pupil, and perpendicular to the
            surface of the eye.
  
      {Radical axis of two circles} (Geom.), the straight line
            perpendicular to the line joining their centers and such
            that the tangents from any point of it to the two circles
            shall be equal to each other.
  
      {Spiral axis} (Arch.), the axis of a twisted column drawn
            spirally in order to trace the circumvolutions without.
  
      {Axis of abscissas} and {Axis of ordinates}. See {Abscissa}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   d8Thalamus \[d8]Thal"a*mus\, n.; pl. {Thalami}. [L. thalamus
      chamber, Gr. qa`lamos.]
      1. (Anat.) A mass of nervous matter on either side of the
            third ventricle of the brain; -- called also {optic
            thalamus}.
  
      2. (Bot.)
            (a) Same as {Thallus}.
            (b) The receptacle of a flower; a torus.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optic \Op"tic\, Optical \Op"tic*al\, a. [F. optique, Gr. [?];
      akin to [?] sight, [?] I have seen, [?] I shall see, and to
      [?] the two eyes, [?] face, L. oculus eye. See {Ocular},
      {Eye}, and cf. {Canopy}, {Ophthalmia}.]
      1. Of or pertaining to vision or sight.
  
                     The moon, whose orb Through optic glass the Tuscan
                     artist views.                                    --Milton.
  
      2. Of or pertaining to the eye; ocular; as, the optic nerves
            (the first pair of cranial nerves) which are distributed
            to the retina. See Illust. of {Brain}, and {Eye}.
  
      3. Relating to the science of optics; as, optical works.
  
      {Optic angle} (Opt.), the angle included between the optic
            axes of the two eyes when directed to the same point; --
            sometimes called {binocular parallax}.
  
      {Optic axis}. (Opt.)
            (a) A line drawn through the center of the eye
                  perpendicular to its anterior and posterior surfaces.
                  In a normal eye it is in the direction of the optic
                  axis that objects are most distinctly seen.
            (b) The line in a doubly refracting crystal, in the
                  direction of which no double refraction occurs. A
                  uniaxial crystal has one such line, a biaxial crystal
                  has two.
  
      {Optical circle} (Opt.), a graduated circle used for the
            measurement of angles in optical experiments.
  
      {Optical square}, a surveyor's instrument with reflectors for
            laying off right angles.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optic \Op"tic\, Optical \Op"tic*al\, a. [F. optique, Gr. [?];
      akin to [?] sight, [?] I have seen, [?] I shall see, and to
      [?] the two eyes, [?] face, L. oculus eye. See {Ocular},
      {Eye}, and cf. {Canopy}, {Ophthalmia}.]
      1. Of or pertaining to vision or sight.
  
                     The moon, whose orb Through optic glass the Tuscan
                     artist views.                                    --Milton.
  
      2. Of or pertaining to the eye; ocular; as, the optic nerves
            (the first pair of cranial nerves) which are distributed
            to the retina. See Illust. of {Brain}, and {Eye}.
  
      3. Relating to the science of optics; as, optical works.
  
      {Optic angle} (Opt.), the angle included between the optic
            axes of the two eyes when directed to the same point; --
            sometimes called {binocular parallax}.
  
      {Optic axis}. (Opt.)
            (a) A line drawn through the center of the eye
                  perpendicular to its anterior and posterior surfaces.
                  In a normal eye it is in the direction of the optic
                  axis that objects are most distinctly seen.
            (b) The line in a doubly refracting crystal, in the
                  direction of which no double refraction occurs. A
                  uniaxial crystal has one such line, a biaxial crystal
                  has two.
  
      {Optical circle} (Opt.), a graduated circle used for the
            measurement of angles in optical experiments.
  
      {Optical square}, a surveyor's instrument with reflectors for
            laying off right angles.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Biprism \Bi"prism\, n. [Pref. bi- + prism.]
      1. A prism whose refracting angle is very nearly 180 degrees.
  
      2. A combination of two short rectangular glass prisms
            cemented together at their diagonal faces so as to form a
            cube; -- called also {optical cube}. It is used in one
            form of photometer.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Parallax \Par"al*lax\, n. [Gr. [?] alternation, the mutual
      inclination of two lines forming an angle, fr. [?] to change
      a little, go aside, deviate; [?] beside, beyond + [?] to
      change: cf. F. parallaxe. Cf. {Parallel}.]
      1. The apparent displacement, or difference of position, of
            an object, as seen from two different stations, or points
            of view.
  
      2. (Astron.) The apparent difference in position of a body
            (as the sun, or a star) as seen from some point on the
            earth's surface, and as seen from some other conventional
            point, as the earth's center or the sun.
  
      {Annual parallax}, the greatest value of the heliocentric
            parallax, or the greatest annual apparent change of place
            of a body as seen from the earth and sun; as, the annual
            parallax of a fixed star.
  
      {Binocular parallax}, the apparent difference in position of
            an object as seen separately by one eye, and then by the
            other, the head remaining unmoved.
  
      {Diurnal}, [or] {Geocentric}, {parallax}, the parallax of a
            body with reference to the earth's center. This is the
            kind of parallax that is generally understood when the
            term is used without qualification.
  
      {Heliocentric parallax}, the parallax of a body with
            reference to the sun, or the angle subtended at the body
            by lines drawn from it to the earth and sun; as, the
            heliocentric parallax of a planet.
  
      {Horizontal parallax}, the geocentric parallx of a heavenly
            body when in the horizon, or the angle subtended at the
            body by the earth's radius.
  
      {Optical parallax}, the apparent displacement in position
            undergone by an object when viewed by either eye singly.
            --Brande & C.
  
      {Parallax of the cross wires} (of an optical instrument),
            their apparent displacement when the eye changes its
            position, caused by their not being exactly in the focus
            of the object glass.
  
      {Stellar parallax}, the annual parallax of a fixed star.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optic \Op"tic\, Optical \Op"tic*al\, a. [F. optique, Gr. [?];
      akin to [?] sight, [?] I have seen, [?] I shall see, and to
      [?] the two eyes, [?] face, L. oculus eye. See {Ocular},
      {Eye}, and cf. {Canopy}, {Ophthalmia}.]
      1. Of or pertaining to vision or sight.
  
                     The moon, whose orb Through optic glass the Tuscan
                     artist views.                                    --Milton.
  
      2. Of or pertaining to the eye; ocular; as, the optic nerves
            (the first pair of cranial nerves) which are distributed
            to the retina. See Illust. of {Brain}, and {Eye}.
  
      3. Relating to the science of optics; as, optical works.
  
      {Optic angle} (Opt.), the angle included between the optic
            axes of the two eyes when directed to the same point; --
            sometimes called {binocular parallax}.
  
      {Optic axis}. (Opt.)
            (a) A line drawn through the center of the eye
                  perpendicular to its anterior and posterior surfaces.
                  In a normal eye it is in the direction of the optic
                  axis that objects are most distinctly seen.
            (b) The line in a doubly refracting crystal, in the
                  direction of which no double refraction occurs. A
                  uniaxial crystal has one such line, a biaxial crystal
                  has two.
  
      {Optical circle} (Opt.), a graduated circle used for the
            measurement of angles in optical experiments.
  
      {Optical square}, a surveyor's instrument with reflectors for
            laying off right angles.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optically \Op"tic*al*ly\, adv.
      By optics or sight; with reference to optics.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
  
  
      {Optically active}, {Optically inactive} (Chem. Physics),
            terms used of certain metameric substances which, while
            identical with each other in other respects, differ in
            this, viz., that they do or do not produce right-handed or
            left-handed circular polarization of light.
  
      {Optically positive}, {Optically negative}. See under
            {Refraction}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
  
  
      {Optically active}, {Optically inactive} (Chem. Physics),
            terms used of certain metameric substances which, while
            identical with each other in other respects, differ in
            this, viz., that they do or do not produce right-handed or
            left-handed circular polarization of light.
  
      {Optically positive}, {Optically negative}. See under
            {Refraction}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
  
  
      {Optically active}, {Optically inactive} (Chem. Physics),
            terms used of certain metameric substances which, while
            identical with each other in other respects, differ in
            this, viz., that they do or do not produce right-handed or
            left-handed circular polarization of light.
  
      {Optically positive}, {Optically negative}. See under
            {Refraction}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
  
  
      {Optically active}, {Optically inactive} (Chem. Physics),
            terms used of certain metameric substances which, while
            identical with each other in other respects, differ in
            this, viz., that they do or do not produce right-handed or
            left-handed circular polarization of light.
  
      {Optically positive}, {Optically negative}. See under
            {Refraction}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optician \Op*ti"cian\, n. [Cf. F. opticien. See {Optic}, a.]
      1. One skilled in optics. [R.] --A. Smith.
  
      2. One who deals in optical glasses and instruments.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optics \Op"tics\, n. [Cf. F. optique, L. optice, Gr. [?] (sc.
      [?]). See {Optic}.]
      That branch of physical science which treats of the nature
      and properties of light, the laws of its modification by
      opaque and transparent bodies, and the phenomena of vision.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optigraph \Op"ti*graph\, n. [Optic + -graph: cf. F.
      opticographe. See {Optic}, a. ]
      A telescope with a diagonal eyepiece, suspended vertically in
      gimbals by the object end beneath a fixed diagonal plane
      mirror. It is used for delineating landscapes, by means of a
      pencil at the eye end which leaves the delineation on paper.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optocd2le \Op"to*c[d2]le\, d8Optocd2lia \[d8]Op`to*c[d2]"li*a\,
      n. [NL. optocoelia, fr. Gr. [?] optic + [?] a hollow.]
      (Anat.)
      The cavity of one of the optic lobes of the brain in many
      animals. --B. G. Wilder.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optogram \Op"to*gram\, n. [Optic + -gram: cf. F. optogramme.]
      (Physiol.)
      An image of external objects fixed on the retina by the
      photochemical action of light on the visual purple. See
      {Optography}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Optography \Op*tog"ra*phy\, n. [Optic + -graphy.] (Physiol.)
      The production of an optogram on the retina by the
      photochemical action of light on the visual purple; the
      fixation of an image in the eye. The object so photographed
      shows white on a purple or red background. See {Visual
      purple}, under {Visual}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Ovate-acuminate \O"vate-a*cu"mi*nate\, a.
      Having an ovate form, but narrowed at the end into a slender
      point.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Ovate-cylindraceous \O"vate-cyl`in*dra"ceous\, a.
      Having a form intermediate between ovate and cylindraceous.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Ovate-subulate \O"vate-su"bu*late\, a.
      Having an ovate form, but with a subulate tip or extremity.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Ovato-acuminate \O*va"to-a*cu"mi*nate\, a.
      Same as {Ovate-acuminate}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Ovato-cylindraceous \O*va"to-cyl`in*dra"ceous\, a.
      Same as {Ovate-cylindraceous}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Oviducal \O`vi*du"cal\, a. (Anat.)
      Of or pertaining to oviducts; as, oviducal glands.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Oviduct \O"vi*duct\, n. [Ovum + duct: cf. F. oviducte.] (Anat.)
      A tube, or duct, for the passage of ova from the ovary to the
      exterior of the animal or to the part where further
      development takes place. In mammals the oviducts are also
      called {Fallopian tubes}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Ovotesttis \O`vo*test"tis\, n. [NL. See {Ovum}, and {Testis}.]
      (Zo[94]l.)
      An organ which produces both ova and spermatozoids; an
      hermaphrodite gland.

From U.S. Gazetteer (1990) [gazetteer]:
   Obetz, OH (village, FIPS 57862)
      Location: 39.87670 N, 82.94065 W
      Population (1990): 3167 (1180 housing units)
      Area: 7.1 sq km (land), 0.0 sq km (water)

From U.S. Gazetteer (1990) [gazetteer]:
   Opdyke, IL
      Zip code(s): 62872

From U.S. Gazetteer (1990) [gazetteer]:
   Opdyke West, TX (town, FIPS 54075)
      Location: 33.59115 N, 102.29948 W
      Population (1990): 100 (39 housing units)
      Area: 0.6 sq km (land), 0.0 sq km (water)

From Jargon File (4.2.0, 31 JAN 2000) [jargon]:
   optical diff n.   See {vdiff}.
  
  

From Jargon File (4.2.0, 31 JAN 2000) [jargon]:
   optical grep n.   See {vgrep}.
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   OBDC
  
      Do you mean {ODBC}?
  
      (1996-06-30)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   Optical Carrier 12
  
      (OC-12) A {SONET} rate of 12 * 51.84 = 622.08
      {megabits} per second.
  
      [Matches {STS-12}]?
  
      (1997-05-26)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   Optical Carrier 3
  
      (OC-3) A {SONET} rate of 3 * 51.84 = 155.52
      {megabits} per second, which matches {STS-3}.
  
      (1997-02-05)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   Optical Carrier 48
  
      (OC-48) A {SONET} rate of 48 * 51.84 = 2488.32
      {megabits} per second.
  
      [Matches {STS-48}]?
  
      (1997-05-26)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   Optical Carrier n
  
      (OC-n) A {SONET} rate of n times 51.84 {megabits}
      per second.
  
      (1997-02-05)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   Optical Character Recognition
  
      (OCR, sometimes /oh'k*/) Recognition of printed or
      written characters by computer.   Each page of text is
      converted to a digital using a {scanner} and OCR is then
      applied to this image to produce a text file.   This involves
      complex {image processing} {algorithms} and rarely achieves
      100% accuracy so manual proof reading is recommended.
  
      (1999-08-26)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   optical diff
  
      {vdiff}
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   optical fiber
  
      {optical fibre}
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   optical fibre
  
      (fibre optics, FO, US "fiber", light pipe) A
      plastic or glass (silicon dioxide) fibre no thicker than a
      human hair used to transmit information using infra-red or
      even visible light as the carrier (usually a laser).   The
      light beam is an electromagnetic signal with a frequency in
      the range of 10^14 to 10^15 Hertz.
  
      Optical fibre is less susceptible to external noise than other
      transmission media, and is cheaper to make than copper wire,
      but it is much more difficult to connect.   Optical fibres are
      difficult to tamper with (to monitor or inject data in the
      middle of a connection), making them appropriate for secure
      communications.   The light beams do not escape from the medium
      because the material used provides total internal reflection.
  
      {AT&T} {Bell Laboratories} in the United States managed to
      send information at a rate of 420 megabits per second, over
      161.5 km through an optical fibre cable.   In Japan, 445.8
      megabits per second was achieved over a shorter distance.   At
      this rate, the entire text of the Encyclopedia Britannica
      could be transmitted in one second.   Currently, AT&T is
      working on a world network to support high volume data
      transmission, international computer networking, {electronic
      mail} and voice communications (a single fibre can transmit
      200 million telephone conversations simultaneously).
  
      See also {FDDI}, {Optical Carrier n}, {SONET}.
  
      (1997-05-26)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   optical grep
  
      {vgrep}
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   Optical Mark Reader
  
      (OMR) A special scanning device that can read
      carefully placed pencil marks on specially designed documents.
      OMR is frequenty used in forms, questionnaires, and
      answer-sheets.
  
      (1995-04-13)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   optical mouse
  
      Any kind of {mouse} that uses visible light or
      infrared to detect changes in its position.
  
      (1999-07-21)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   Optical Storage Technology Association
  
      (OSTA) An industry consortium concerned with {optical
      storage}.   OSTA wrote and maintains the {UDF} {file system}
      used on {DVD video} discs.
  
      {OSTA Home (http://www.osta.org/)}.
  
      (2003-07-12)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   Optical Time Domain Reflectometer
  
      A device used to perform {Optical Time Domain
      Reflectometry}.
  
      (1995-02-01)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   Optical Time Domain Reflectometry
  
      Measurement of the elapsed time and intensity of light
      reflected on {optical fibre} using an optical time domain
      reflectometer.   The reflectometer can compute the distance to
      problems on the fibre such as attenuation and breaks, making
      it a useful tool in optical network trouble-shooting.
  
      (1995-02-01)
  
  
No guarantee of accuracy or completeness!
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