sidereal year
- the orbital period of the earth around the sun, taking the stars as a reference frame. It is 20 minutes longer than the solar or tropical year because of precession.
noun: sidereal year, plural noun: sidereal years
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- IPA[sīˈdirēəl yi(ə)r]
- the orbital period of the earth around the sun, taking the stars as a reference frame. It is 20 ...
Oxford American Dictionary
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...year, this period (354.37 days) is sometimes referred to as lunar year, corresponding to thirteen sidereal months (355.18 days). Examples Most lunar...