Relating to nymphs; nymphean.In zoology, of or pertaining to a nymph or nympha: as, the nymphal stage of an insect.n. A fanciful name given by Drayton to the ten divisions (nymphals) of his poem “The Muses' Elysium.”n. In botany, a member of one of Lindley's alliances, the Nymphales, which includes the Nymphæaceæ. Nelumbiaceæ, etc.