— pumiceous /pyooh mish"euhs/ , adj. — pumicer , n.
/pum"is/ , n. , v. , pumiced, pumicing .
n.
1. Also called pumice stone . a porous or spongy form of volcanic glass, used as an abrasive.
v.t.
2. to rub, smooth, clean, etc., with pumice.
[ bef. 1000; pumic-, s. of pumex pumice stone; r. ME pomis ( e ), pomish ( e ), pomice pomis pumic- ( pumicstan pumice stone; see POUNCE 3 ]