Pumice

['pʌmɪs]

解释:

(noun.) a light glass formed on the surface of some lavas; used as an abrasive.

(verb.) rub with pumice, in order to clean or to smoothen.

阿纳托尔校对--From WordNet

解释:

(n.) 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.

布什校对

解释:

n. a hard light spongy substance formed of lava from which gas or steam has escaped while hardening.—v.t. to polish or rub with pumice-stone—also Pū′micāte.—adjs. Pumi′ceous Pum′iciform of or like pumice.—ns. Pum′ice-stone (same as Pumice); Pū′my (Spens.) a pebble stone.

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