sidereal year


noun Astronomy.

a division of time equal to the equinoctial year plus 20 minutes, representing the time required for the earth to complete one revolution around the sun, measured with relation to the fixed stars.

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Origin of sidereal year

First recorded in 1675–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for sidereal year

sidereal year

noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012