diurnal circle

diurnal circle
noun
: the apparent circle or parallel of declination described by a celestial body in consequence of the earth's rotation

* * *

Astron.
the apparent circle described by a heavenly body as a result of one rotation by the earth.

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diurnal circle,
the apparent circle described by a heavenly body in its daily motion of rising and sting, resulting from the rotation of the earth. The diurnal circles of the stars are parallel and are described in the same period, but those of the sun, moon, and planets are not parallel and have different periods.

Useful english dictionary. 2012.

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  • 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 circle — Circle Cir cle (s[ e]r k l), n. [OE. cercle, F. cercle, fr. L. circulus (Whence also AS. circul), dim. of circus circle, akin to Gr. kri kos, ki rkos, circle, ring. Cf. {Circus}, {Circum }.] [1913 Webster] 1. A plane figure, bounded by a single… …   The Collaborative International Dictionary of English

  • diurnal circle — Astron. the apparent circle described by a heavenly body as a result of one rotation by the earth. * * * …   Universalium

  • 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 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 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… …   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

  • Diurnal revolution of a planet — 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

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