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giant clam

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WordReference Random House Unabridged Dictionary of American English © 2026

gi′ant clam′,

Invertebratesany 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 lb. (225 kg).

1945–50

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