Any of the Pinnidae, a family of large saltwater clams.

Alternative form of backshell

Synonym of Dyson sphere

Any of several species of conical gastropod shells in the family Trochidae and genus Astraea in family Turbinidae, the margin of the shells being toothed somewhat like the rowel of a spur.

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