- Also called pumice stone. a porous or spongy form of volcanic glass, used as an abrasive.
- to rub, smooth, clean, etc., with pumice.
Origin of pumice
Examples from the Web for pumice-stone
The reason why they can float seems to be that the clay of which they are made is like pumice-stone.Ten Books on Architecture
The shore of this island is very rocky, except the part we landed at, and here I picked up many pieces of pumice-stone.
The giant of pumice-stone immediately glowed like molten iron.Complete Short Works
They were finished by the application of chalk, and by rubbing them with pumice-stone.Popular Technology; Volume 2
A commencement of polishing is now to be given with pumice-stone powder.
- Also called: pumice stone a light porous acid volcanic rock having the composition of rhyolite, used for scouring and, in powdered form, as an abrasive and for polishing
- (tr) to rub or polish with pumice
Word Origin and History for pumice-stone
c.1400, from Anglo-French and Old French pomis (13c.), from Late Latin pomicem (nominative pomex, genitive pumicis), from Oscan *poimex or some other dialectal variant of Latin pumex "pumice," from PIE *(s)poi-mo-, a root with connotations of "foam, froth" (see foam (n.)). Old English had pumic-stan. As a verb, early 15c., from the noun.
- A light, porous, glassy lava, used as an abrasive.
- A usually light-colored, porous, lightweight rock of volcanic origin. The pores form when water vapor and gases escape from the lava during its quick solidification into rock.