| Noun | 1. | mussel - black marine bivalves usually steamed in wineedible mussel, Mytilus edulis - a mussel with a dark shell that lives attached to rocks shellfish - meat of edible aquatic invertebrate with a shell (especially a mollusk or crustacean) |
| 2. | mussel - marine or freshwater bivalve mollusk that lives attached to rocks etc. bivalve, lamellibranch, pelecypod - marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together marine mussel, mytilid - marine bivalve mollusk having a dark elongated shell; live attached to solid objects especially in intertidal zones freshwater clam, freshwater mussel - bivalve mollusk abundant in rivers of central United States |