Webster's Revised Unabridged Dictionary · 1913

Adiantum

Adiantum ({not transcribed}) , noun

[Latin, from Greek 'adi`anton, maidenhair; 'a priv. + diai`nein to wet.]

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