Of or pertaining to the spring; belonging to the spring; appearing in spring: as, vernal bloom.
Of or belonging to youth, the springtime of life.
In botany, appearing in spring: as, vernal flowers.
Done or accomplished in spring: as, the vernal migration or molt of birds
noun.
The trade-name of diethylmalonvlurea, a colorless, crystalline powder, used in medicine as a soporific.