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pumice |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Pumice \Pum"ice\, n. [L. pumex, pumicis prob. akin to spuma foam: cf AS pumic-st[=a]n. Cf {Pounce} a powder, {Spume}.] (Min.) A very light porous volcanic scoria, usually of a gray color, the pores of which are capillary and parallel, giving it a fibrous structure. It is supposed to be produced by the disengagement of watery vapor without liquid or plastic lava. It is much used esp. in the form of powder, for smoothing and polishing. Called also {pumice stone}. From WordNet r 1.6 [wn]: pumice n : a light glass formed on the surface of some lavas; used as an abrasive [syn: {pumice stone}]
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