P0330200 (pĭz′mō)n. A large, thick-shelled, edible marine clam (Tivela stultorum) of the southern Pacific coast of North America.[After Pismo Beach, a city of southwest California.]
pis′mo clam′
(ˈpɪz moʊ) n. a large edible clam, Tivela stultorum, of California and Mexico. [1910–15; after Pismo Beach, California]