sidereal vs. solar day
[sahy-deer-ee-uhl]
/ saɪˈdɪər i əl /
adjective
Astronomy.
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determined by or from the stars.
sidereal time.
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of or relating to the stars.
noun
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Astronomy. the time interval between two successive transits by the sun of the meridian directly opposite that of the observer; the 24-hour interval from one midnight to the following midnight.
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Law. the period of time from sunrise to sunset.
