Definition of Pismo clam in English:

Pismo clam

noun

US
  • A large, thick-shelled, edible clam, Tivela stultorum (family Veneridae), found on the south-west coast of North America.

Origin

Early 20th century. From the name of Pismo Beach, California + clam.

Pronunciation

Pismo clam

/ˈpɪzməʊ klam/