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linear
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English Dictionary: linear by the DICT Development Group
3 results for linear
From WordNet (r) 3.0 (2006) [wn]:
linear
adj
  1. designating or involving an equation whose terms are of the first degree
    Synonym(s): linear, additive
    Antonym(s): nonlinear
  2. of or in or along or relating to a line; involving a single dimension; "a linear measurement"
    Synonym(s): linear, one- dimensional
    Antonym(s): cubic, planar, three-dimensional, two-dimensional
  3. of a circuit or device having an output that is proportional to the input; "analogue device"; "linear amplifier"
    Synonym(s): analogue, analog, linear
    Antonym(s): digital
  4. (of a leaf shape) long and narrow
    Synonym(s): linear, elongate
  5. measured lengthwise; "cost of lumber per running foot"
    Synonym(s): linear, running(a)
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Linear \Lin"e*ar\ (-[esl]*[etil]r), a. [L. linearis, linearius,
      fr. linea line: cf. F. lin[82]aire. See 3d {Line}.]
      1. Of or pertaining to a line; consisting of lines; in a
            straight direction; lineal.
  
      2. (Bot.) Like a line; narrow; of the same breadth
            throughout, except at the extremities; as, a linear leaf.
  
      {Linear differential equation} (Math.), an equation which is
            of the first degree, when the expression which is equated
            to zero is regarded as a function of the dependent
            variable and its differential coefficients.
  
      {Linear equation} (Math.), an equation of the first degree
            between two variables; -- so called because every such
            equation may be considered as representing a right line.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Micrometer \Mi*crom"e*ter\, n. [Micro- + -meter: cf. F.
      microm[8a]tre.]
      An instrument, used with a telescope or microscope, for
      measuring minute distances, or the apparent diameters of
      objects which subtend minute angles. The measurement given
      directly is that of the image of the object formed at the
      focus of the object glass.
  
      {Circular, [or] Ring}, {micrometer}, a metallic ring fixed in
            the focus of the object glass of a telescope, and used to
            determine differences of right ascension and declination
            between stars by observations of the times at which the
            stars cross the inner or outer periphery of the ring.
  
      {Double image micrometer}, a micrometer in which two images
            of an object are formed in the field, usually by the two
            halves of a bisected lens which are movable along their
            line of section by a screw, and distances are determined
            by the number of screw revolutions necessary to bring the
            points to be measured into optical coincidence. When the
            two images are formed by a bisected object glass, it is
            called a divided-object-glass micrometer, and when the
            instrument is large and equatorially mounted, it is known
            as a heliometer.
  
      {Double refraction micrometer}, a species of double image
            micrometer, in which the two images are formed by the
            double refraction of rock crystal.
  
      {Filar, [or] Bifilar}, {micrometer}. See under {Bifilar}.
  
      {Micrometer} {caliper [or] gauge} (Mech.), a caliper or gauge
            with a micrometer screw, for measuring dimensions with
            great accuracy.
  
      {Micrometer head}, the head of a micrometer screw.
  
      {Micrometer microscope}, a compound microscope combined with
            a filar micrometer, used chiefly for reading and
            subdividing the divisions of large astronomical and
            geodetical instruments.
  
      {Micrometer screw}, a screw with a graduated head used in
            some forms of micrometers.
  
      {Position micrometer}. See under {Position}.
  
      {Scale}, [or] {Linear}, {micrometer}, a minute and very
            delicately graduated scale of equal parts used in the
            field of a telescope or microscope, for measuring
            distances by direct comparison.
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