sidereal year

English Thesaurus

1. the time for the earth to make one complete revolution around the sun, relative to the fixed stars (noun.time)

hypernym	:	year,
definition	:	the period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun (noun.time)

hypernym	:	sidereal time,
definition	:	measured by the diurnal motion of stars (noun.time)