sidereal day
noun Astronomy.
the interval between two successive passages of the vernal equinox over the meridian, being about four minutes shorter than a mean solar day.
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Origin of sidereal day
First recorded in 1785–95
Words nearby sidereal day
side of the tracks, side-on, sidepiece, side pot, sidereal, sidereal day, sidereal hour, sidereal hour angle, sidereal month, sidereal period, sidereal time
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for sidereal day
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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