Also called lamellibranch. Zoology . any mollusk, as the oyster, clam, scallop, or mussel, of the class Bivalvia, having two shells hinged together, a soft body, and lamellate gills.

Botany . having two valves, as a seedcase.

Zoology . having two shells, usually united by a hinge.

having two similar parts hinged together.

noun

clam , cockle , mollusk , mussel , oyster , scallop , spat