equinoctial year

Thesaurus

Noun

1.equinoctial year - the time for the earth to make one revolution around the sun, measured between two vernal equinoxesastronomical year, solar year, tropical yearyear - the period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun; "a Martian year takes 687 of our days"