sidereal day


sidereal day

noun

Definition of SIDEREAL DAY

:  the interval between two successive transits of a point on the celestial sphere (as the vernal equinox) over the upper meridian of a place :  23 hours, 56 minutes, 4.1 seconds of mean time

First Known Use of SIDEREAL DAY

1764

Browse

Next Word in the Dictionary: sidereal hour
Previous Word in the Dictionary: sidereal clock
All Words Near: sidereal day

Seen & Heard

What made you want to look up sidereal day? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More