giant clam

noun

any of several huge clams of the family Tridacnidae, inhabiting the shallow waters of coral reefs in the tropical Indo-Pacific, as Tridacna gigas: some may weigh more than 500 pounds (225 kg).

Origin of giant clam

First recorded in 1945–50

Words nearby giant clam

giant cell myeloma, giant cell pneumonia, giant cell sarcoma, giant cell tumor of bone, giant cell tumor of tendon sheath, giant clam, giant condyloma, giant crab, giant fennel, giant garlic, giant granadilla