giant clam

[ jahy-uhnt klam ]

noun

any of several huge clams of the family Tridacnidae, inhabiting the shallow waters of coral reefs in the tropical Indo-Pacific, including Tridacna squamosa(fluted giant clam ), a relatively hardy but conservation dependent species that grows to about 16 inches (40 centimeters) across.

Origin of giant clam

¹

First recorded in 1945–50

Words Nearby giant clam

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use giant clam in a sentence

The length of this "giant clam" is from four to seven inches.
The Sea-beach at Ebb-tide | Augusta Foote Arnold

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