A bivalve mollusk of many kinds, especially those that are edible; for example the soft-shell clam (Mya arenaria), the hard clam (Mercenaria mercenaria), the sea clam or hen clam (Spisula solidissima), and other species. The name is said to have been given originally to the Tridacna gigas, a huge East Indian bivalve.
User Defined Definitions
"burrowing marine mollusk living on sand or mud; the shell closes with viselike firmness"
"a piece of paper money worth one dollar"
"flesh of either hard-shell or soft-shell clams"
"gather clams, by digging in the sand by the ocean"