Pumice



[puhm-is] /ˈpʌm ɪs/

noun
1.
Also called pumice stone. a porous or spongy form of volcanic glass, used as an abrasive.
verb (used with object), pumiced, pumicing.
2.
to rub, smooth, clean, etc., with pumice.
/ˈpʌmɪs/
noun
1.
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
verb
2.
(transitive) to rub or polish with pumice
n.

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.

pumice pum·ice (pŭm’ĭs)
n.
A light, porous, glassy lava, used as an abrasive.
pumice
(pŭm’ĭs)
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.

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