Adiantum \Ad`i*an"tum\, n. [L., fr. Gr. ?, maidenhair; 'a priv. + ? to wet.]

(Bot.) A genus of ferns, the leaves of which shed water; maidenhair. Also, the black maidenhair, a species of spleenwort.

Source: Webster's Revised Unabridged Dictionary (1913)