An Etymological Dictionary of Astronomy and Astrophysics

Of or pertaining to spring. → vernal equinox.

Etymology (EN): From L. vernalis “of the spring,” from vernus “of spring,” from uēr “spring,” cognate with Pers. bahâr, as below.

Etymology (PE): Bahâri of or pertaining to bahâr “spring;” Mid.Pers. wahâr “spring;” O.Pers. vāhara- “spring time,” θūra-vāhara- “name of a spring month;” Av. vaηhar “spring;” cf. Skt. vasara- “relating or appearing in the morning;”
Gk. ear “spring;” L. uēr “spring,” vernus “of spring;” O.N. vār “spring;” Lith. vasara “summer;” O.C.S. vesna “spring.”