bivalve: Meaning and Definition of

bi•valve

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

1. having two valves, as a seedcase.
2. having two shells, usually united by a hinge.
3. having two similar parts hinged together.