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WordReference Random House Unabridged Dictionary of American English © 2024gap•er (gā′pər),USA pronunciation n. - Invertebratesa person or thing that gapes.
- InvertebratesAlso called horse clam. a large clam, Tresus capax, common on gravelly and coarse-sand beaches.
Collins Concise English Dictionary © HarperCollins Publishers:: ˈgaper /ˈɡeɪpə/ n - a person or thing that gapes
- any of various large marine bivalve molluscs of the genera Mya and Lutraria that burrow in muddy sand. M. arenaria is the American soft-shelled clam and the two species of Lutraria are the otter shells. The valves have a permanent gap at the hind end
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