Meaning of giant clam

gi'ant clam'

Pronunciation: [key]
  1. 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 lb. (225 kg).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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