sidereal

si·de·re·al  (s-dîr-l)

adj.

1. Of, relating to, or concerned with the stars or constellations; stellar.

2. Measured or determined by means of the apparent daily motion of the stars: sidereal time.

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[From Latin sdereus, from sdus, sder-, constellation, star.]

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sidereal [side-eer-ee-al]

Adjective

of or determined with reference to the stars: the sidereal time [Latin sidus a star]

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sidereal  (s-dîr-l)

1. Relating to the stars or constellations.

2. Measured with respect to the background of fixed stars instead of the Sun.

Thesaurus

Adj.	1.	sidereal - of or relating to the stars or constellations; "sidereal bodies"; "the sidereal system"
	2.	sidereal - (of divisions of time) determined by daily motion of the stars; "sidereal time" civil - (of divisions of time) legally recognized in ordinary affairs of life; "the civil calendar"; "a civil day begins at mean midnight"