1. Also called pompano, butterfly-shell clam.
a small clam, Donax variabilis,
abundant in the intertidal zone of eastern and southern U.S. coastal beaches, having fanlike bands of various hues, the paired empty shells often spread in a butterfly shape.
any similar clam, especially of the genus Donax.
a soft, whitish rock made up of fragments of marine shells and coral, used as a building material.
Americanism; < Spanish:
literally, shellfish, equivalent to Old Spanish coc(a
) shellfish (< Latin concha;
) + -ina -ine1