Diurnal : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: Diurnal	by the DICT Development Group
4 results for Diurnal
From WordNet (r) 3.0 (2006) [wn]:
diurnal adj of or belonging to or active during the day; "diurnal animals are active during the day"; "diurnal flowers are open during the day and closed at night"; "diurnal and nocturnal offices" Antonym(s): nocturnal having a daily cycle or occurring every day; "diurnal rotation of the heavens"
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]:
Diurnal \Diur"nal\, a. [L. diurnalis, fr. dies day. See {Deity}, and cf. {Journal}.] 1. Relating to the daytime; belonging to the period of daylight, distinguished from the night; -- opposed to {nocturnal}; as, diurnal* heat; diurnal hours. 2. Daily; recurring every day; performed in a day; going through its changes in a day; constituting the measure of a day; as, a diurnal fever; a diurnal task; diurnal aberration, or diurnal parallax; the diurnal revolution of the earth. Ere twice the horses of the sun shall bring Their fiery torcher his diurnal ring. --Shak. 3. (Bot.) Opening during the day, and closing at night; -- said of flowers or leaves. 4. (Zo[94]l.) Active by day; -- applied especially to the eagles and hawks among raptorial birds, and to butterflies (Diurna) among insects. {Diurnal aberration} (Anat.), the aberration of light arising from the effect of the earth's rotation upon the apparent direction of motion of light. {Diurnal arc}, the arc described by the sun during the daytime or while above the horizon; hence, the arc described by the moon or a star from rising to setting. {Diurnal circle}, the apparent circle described by a celestial body in consequence of the earth's rotation. {Diurnal motion of the earth}, the motion of the earth upon its axis which is described in twenty-four hours. {Diurnal motion of a heavenly body}, that apparent motion of the heavenly body which is due to the earth's diurnal motion. {Diurnal parallax}. See under {Parallax}. {Diurnal revolution of a planet}, the motion of the planet upon its own axis which constitutes one complete revolution. Syn: See {Daily}.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Diurnal \Diur"nal\, n. [Cf. F. diurnal* a prayerbook. See {Diurnal}, a.] 1. A daybook; a journal. [Obs.] --Tatler. 2. (R. C. Ch.) A small volume containing the daily service for the [bd]little hours,[b8] viz., prime, tierce, sext, nones, vespers, and compline. 3. (Zo[94]l.) A diurnal bird or insect.