maid·en·hair fern  (mād'n-hâr')  n. Any of various ferns of the genus Adiantum, having purplish to black stalks, usually feathery fronds, and delicate fan-shaped leaflets with marginal sori. [From the fineness of its stems.] |
| maidenhair fern | |
noun | |
| any of various small to large terrestrial ferns of the genus Adiantum having delicate palmately branched fronds [syn: maidenhair] |