Adiantum

Ad·i·an·tum

noun \ˌad-ē-ˈant-əm\

Definition of ADIANTUM

: a genus of ferns (family Polypodiaceae) with delicate palmately branched fronds comprising the maidenhair ferns and including two North American forms (A. pedatum and the Venushair A. capillus-veneris) that have been used in the preparation of expectorants and demulcents