Dō'nax, n.

noun

n. [Lat., from Gr. δόναξ, reed, also a kind of fish.]

(Bot.) A species of grass of the genus Arundo (A. donax), growing in the south of Europe, and much used for fishing-rods, and for various purposes.
(Conch.) A genus of bivalve mollusks having wedge-shaped shells, with a very obtuse margin in the fore-part.