AdiantumAd`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.
|cosmopolitan genus of ferns: maidenhair ferns; in some classification systems placed in family Polypodiaceae or Adiantaceae|