Diurnal motion of the earth
- Diurnal motion of the earth
- Diurnal Di*ur"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.
[1913 Webster]
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.
[1913 Webster]
Ere twice the horses of the sun shall bring
Their fiery torcher his diurnal ring. --Shak.
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3. (Bot.) Opening during the day, and closing at night; --
said of flowers or leaves.
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4. (Zo["o]l.) Active by day; -- applied especially to the
eagles and hawks among raptorial birds, and to butterflies
(Diurna) among insects.
[1913 Webster]
{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}.
[1913 Webster]
The Collaborative International Dictionary of English.
2000.
Look at other dictionaries:
Diurnal motion of a heavenly body — Diurnal Di*ur 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. [1913… … The Collaborative International Dictionary of English
Diurnal motion — is an astronomical term referring to the apparent daily motion of stars around the Earth, or more precisely around the two celestial poles. It is caused by the Earth s rotation on its axis, so every star apparently moves on a circle, that is… … Wikipedia
diurnal motion — Astron. the apparent daily motion, caused by the earth s rotation, of celestial bodies across the sky. * * * ▪ astronomy apparent daily motion of the heavens from east to west in which celestial objects seem to rise and set, a phenomenon… … Universalium
diurnal motion — noun : the apparent westward motion of the celestial sphere and celestial bodies resulting from the rotation of the earth; also : the earth s rotation * * * Astron. the apparent daily motion, caused by the earth s rotation, of celestial bodies… … Useful english dictionary
Diurnal acceleration of the fixed stars — Acceleration Ac*cel er*a tion, n. [L. acceleratio: cf. F. acc[ e]l[ e]ration.] The act of accelerating, or the state of being accelerated; increase of motion or action; as, a falling body moves toward the earth with an acceleration of velocity;… … The Collaborative International Dictionary of English
Diurnal — Di*ur 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. [1913 Webster] 2.… … The Collaborative International Dictionary of English
Diurnal aberration — Diurnal Di*ur 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. [1913… … The Collaborative International Dictionary of English
Diurnal arc — Diurnal Di*ur 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. [1913… … The Collaborative International Dictionary of English
Diurnal circle — Diurnal Di*ur 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. [1913… … The Collaborative International Dictionary of English
Diurnal parallax — Diurnal Di*ur 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. [1913… … The Collaborative International Dictionary of English
