Source : Webster's Revised Unabridged Dictionary (1913)

Vernal \Ver"nal\, a. [L. vernalis, fr. vernus vernal, ver
   spring; akin to Gr. ?, Skr. vasanta, Icel. v[=a]r, and E.
   Easter, east.]
   1. Of or pertaining to the spring; appearing in the spring;
      as, vernal bloom.

   2. Fig.: Belonging to youth, the spring of life.

            When after the long vernal day of life. --Thomson.

            And seems it hard thy vernal years Few vernal joys
            can show?                             --Keble.

Source : WordNet®

vernal
     adj 1: suggestive of youth; vigorous and fresh [syn: {youthful}]
     2: of or characteristic of or occurring in spring; "the vernal
        equinox" [ant: {summery}, {autumnal}, {wintry}]