gaper
(ˈɡeɪpə) n1. a person or thing that gapes
2. (Animals) 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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
gap•er
(ˈgeɪ pər)
n. 1. a person or thing that gapes.
2. a large clam, Tresus capax, common on gravelly beaches.
[1630–40]
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