vernal equinox

views updated May 29 2018

ver·nal e·qui·nox • n. the equinox in spring, on about March 20 in the northern hemisphere and September 22 in the southern hemisphere. ∎ Astron. the equinox in March. Also called spring equinox. ∎  Astron. another term for First Point of Aries (see Aries).