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

Adiantum (maidenhair fern) is a genus of about 200 species of ferns in the family Pteridaceae, though some researchers place it in its own family, Adiantaceae. The genus name comes from the Greek, meaning "not wetting", referring to the fronds' ability to shed water without becoming wet.