A name applied to various marine univalve shells; esp. to those of the genus Strombus, which are of large size. S. gigas is the large pink West Indian conch. The large king, queen, and cameo conchs are of the genus Cassis. See Cameo.
- Any of various tropical marine gastropod mollusks, especially of the genera Strombus and Cassis, having large, often brightly colored spiral shells and edible flesh.
- The shell of one of these gastropod mollusks, used as an ornament, in making cameos, or as a horn.
- Anatomy See concha.