Pér'na, n.
n. [Lat.] (Zoöl.) A genus of mollusks whose shells have the hinge margin very thick, with a row of pits in the form of furrows, to receive the cartilage. Baird.
n. [Lat.] (Zoöl.) A genus of mollusks whose shells have the hinge margin very thick, with a row of pits in the form of furrows, to receive the cartilage. Baird.