vernal Look up vernal at Dictionary.com
"pertaining to spring," 1534, from L. vernalis "of the spring," from vernus "of spring," from ver "spring," from PIE *wesr- "spring" (cf. O.N. var "spring," Gk. ear, Skt. vasantah, Pers. bahar, O.C.S. vesna "spring," Lith. vasara "summer").