Definition of COQUINA

• 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, esp. of the genus Donax
• soft, whitish rock made up of fragments of marine shells and coral, used as a building material
• a small marine clam [n COQUINAS]