PUMICE-STONE

An Illustrated Encyclopedic Medical Dictionary · 1894 · p. 15

n. Pum'is. Lat., pumex, lapis pumicis ( Vulcani), argilla pumex. Fr., ponce, pierre ponce. Ger., Bims, Bimstein, Putzstein. A light, porous mineral of volcanic origin, used for polishing, etc.; composed chiefly of silica, [a, 35.] PUMII/ [s. 360]