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adjective

Sidereal adj.

Relating to the stars; starry; astral; as, sidereal astronomy.

(Astron.) Measuring by the apparent motion of the stars; designated, marked out, or accompanied, by a return to the same position in respect to the stars; as, the sidereal revolution of a planet; a sidereal day.

Sidereal clock, Sidereal day, Sidereal month, Sidereal year. See under Clock, Day, etc.

Sideral time, time as reckoned by sideral days, or, taking the sidereal day as the unit, the time elapsed since a transit of the vernal equinox, reckoned in parts of a sidereal day. This is, strictly, apparent sidereal time, mean sidereal time being reckoned from the transit, not of the true, but of the mean, equinoctial point.

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Etymology of 'Sidereal'

Collaborative International Dictionary of English 0.48

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"Sidereal" Quotes from Famous Books

... had been but his Princess, the exquisite lady whom it had amused to wander with him into the pays du tendre. She had been as far above him as the now disregarded stars. She had come down with a carnival domino over her sidereal raiment, and had met him on carnival equality. He beau masque! He, knowing her, had fallen beneath her starry spell. He was Paul Kegworthy, Paul Savelli, what you like; Paul the adventurer, Paul the man born to great ...

— The Fortunate Youth • William J. Locke

... but his Princess, the exquisite lady whom it had amused to wander with him into the pays du tendre. She had been as far above him as the now disregarded stars. She had come down with a carnival domino over her sidereal raiment, and had met him on carnival equality. He beau masque! He, knowing her, had fallen beneath her starry spell. He was Paul Kegworthy, Paul Savelli, what you like; Paul the adventurer, Paul the man born to great things. She was a beautiful woman, bearing the title of Princess, the ...

— The Fortunate Youth • William J. Locke

... cast him back from icy shades of chill Even to the heat-fraught regions and the signs That blaze along the Zodiac. So, too, We must suppose the moon and all the stars, Which through the mighty and sidereal years Roll round in mighty orbits, may be sped By streams of air from regions alternate. Seest thou not also how the clouds be sped By contrary winds to regions contrary, The lower clouds diversely from the upper? Then, why may yonder stars ...

— Of The Nature of Things • [Titus Lucretius Carus] Lucretius

... of the most accomplished prince who has as yet occupied the throne of Charles I. does not appear in the list of sovereigns, who have been thus rivalling each other in the patronage of astronomy! What a mortification to English feeling, that the subject of sidereal astronomy created by the munificence of George III. should thus be transferred to the patronage of foreign monarchs. A slight exception must be made in the case of Edinburgh. During the King's visit, ...

— The Mirror of Literature, Amusement, and Instruction, - Vol. 12, Issue 328, August 23, 1828 • Various