pismo clampis·mo clam
a heavy-shelled, edible clam (Tivela stultorum) found on sandy beaches along the coast of California and Mexico
Origin of pismo clamafter Pismo Beach, Calif.
A large, thick-shelled, edible marine clam (Tivela stultorum) of the southern Pacific coast of North America.
Origin of pismo clamAfter Pismo Beach, a city of southwest California