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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.
Origin
1000
before 1000; < Latin pūmic-, stem of pūmex pumice stone; replacing Middle English pomis(e), pomish(e), pomice < Middle French pomis < Latin; compare Old English pumic- (< L), in pumicstān pumice stone; see pounce3
Related forms
pumiceous
[pyoo-mish-uh s] /pyuˈmɪʃ əs/ (Show IPA),
adjective
pumicer, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for pumice-stone

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
Derived Forms
pumiceous (pjuːˈmɪʃəs) adjective
Word Origin
C15 pomys, from Old French pomis, from Latin pūmex
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for pumice-stone

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.

Online Etymology Dictionary, © 2010 Douglas Harper
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pumice-stone in Medicine

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

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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pumice-stone in Science
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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