To divide the members of a group into those that are superior and those that are inferior.

plural of harp shell

An attractive marine gastropod shell of the genus Harpa, found in tropical seas.

A steel suitable for shears, scythes, and other cutting instruments, prepared from fagots of blistered steel by repeated heating, rolling, and tilting, to increase its malleability and fineness of texture.

A curtain in a mine gallery to direct air currents and prevent accumulation of gas.

(military) A shell containing no charge, or one that does not explode.

A sea urchin.

The flat plate which forms the top of the furnace or firebox of an internally fired steam boiler.

lime made by burning the shells of shellfish

A short jacket reaching the hips, once part of military uniforms. / The jacket of a shell suit.