coquina

Meanings

1. Any of several small marine clams, of the species Donax variabilis, common in United States coastal waters.
2. A soft form of limestone made of fragments of shells, sometimes used as a building or road paving material.

Etymology

Borrowed from Spanish coquina (“cockle”), from Latin concha (“bivalve, mollusk; mussel”), from Ancient Greek κόγχη (kónkhē, “mussel; shell”). Related to conch and conk.