freshwater clam

Other forms: freshwater clams

Definitions of freshwater clam

1. noun

   bivalve mollusk abundant in rivers of central United States
   synonyms: freshwater mussel

   types:

   pearly-shelled mussel

   the pearly lining of the dark shells is a source of mother-of-pearl

   thin-shelled mussel

   mussel with thin fragile shells having only rudimentary hinge teeth

   Dreissena polymorpha, zebra mussel

   inch long mollusk imported accidentally from Europe; clogs utility inlet pipes and feeds on edible freshwater mussels

   type of:

   mussel

   marine or freshwater bivalve mollusk that lives attached to rocks etc.