Any of numerous bivalve molluscs found worldwide, typically having a brown or blackish shell and belonging chiefly to the orders Mytiloida (marine…

Any of various kinds of cockle, mussel, or other (esp. edible) bivalve mollusc.

a mussel from which pearls may be obtained, esp. a freshwater mussel of the family Unionidae.

Any of several edible bivalve molluscs: †(a) British regional a scallop of the genus Chlamys, and the surf clam, Spisula solida (obsolete); (b) Nort…

a large and coarse kind of mussel of the genus Modiola; (also) a freshwater mussel, Unio or Anodonta.

A name applied to various bivalve shellfish. In North America, applied esp. to two species, the Hard or Round Clam (Venus mercenaria), and the…

An earlier name of the edible Clams of North America.

A shell which is lined with nacre or mother-of-pearl; the substance of such shells, as a material or commodity. Also: a mollusc which produces…

Apparently: = clam, n.2 1.

Zoology. Chiefly North American. A freshwater mussel or shell, as distinguished from a marine one. Usually in plural, in form naiades. Cf. naid, n.…

Zoology. A freshwater mussel. Cf. naiad, n. 2. Obsolete. rare.

A bivalve mollusc of the family Unionidae; a unio.

A small freshwater mussel with a striped pattern on the shell, Dreissena polymorpha (family Dreissenidae), native to the Black Sea and Caspian Sea…

U.S. regional. A North American freshwater mussel, Lasmigona complanata, with rough ridges on the shell. Now rare.

U.S. An edible freshwater mussel, Quadrula quadrula (family Unionidae), found chiefly in the Mississippi Valley.

U.S. A freshwater mussel, Quadrula metanevra (family Unionidae), with a yellow to light brown shell, found in medium to large rivers in parts of…