Any species of Pleurotomaria, a genus of pearly spiral gastropod shells having a deep slit in the outer lip. Many fossil species are known, and a few living ones are found in deep water in tropical seas.

present participle of shell-shock

Third-person singular simple present indicative form of shell-shock

Any of a number of bivalve molluscs in the family Anomiidae with thin and translucent shells.

A Caribbean gastropod marked with figures resembling music notation.

(South Africa) sand dollar

plural of shell sac

(zoology) The sac in which the shell of a mollusc is secreted during development; (now especially) the fold of mantle in which a cephalopod secretes its pen or gladius.

Synonym of helmet snail

The large West Indian conch shell (Strombus gigas).