The Collaborative International Dictionary
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 lav
It is much used, esp. in the form of powder, for smoothing and polishing. Called also pumice stone.
Wiktionary
alt. A piece of pumice; also used as a collective noun. n. A piece of pumice; also used as a collective noun.
WordNet
n. a light glass formed on the surface of some lavas; used as an abrasive [syn: pumice]
Usage examples of "pumice stone".
We learned it was made with ground pumice stone, a starch-flour made from paper, wood, and cotton, and his food-syrups.
The bath-rubber then took him in, bound an apron round his waist, and lent him a bag, three razors, pumice stone for scrubbing the soles of the feet, a hair bag, and a sponge.
Just scraped with pumice stone and softened with chalk, it had been smoothed with the plane, and, from the tiny holes made on the sides with a fine stylus, all the lines that were to have guided the artist’.
Coal or carbonated wood, pumice stone, lava, and other mineral appearances still continue.
It contained two incredibly filthy one-dollar bills, some loose change, a small brown paper sack of dried roots, two Yale keys and a skeleton key on a rusty key ring, a dried rabbit's foot, a dirty piece of resin, a cheese cloth rag that had served as a handkerchief, a putty knife, a small piece of pumice stone, and a scrap of dirty writing paper folded into a small square.
The putty knife and pumice stone indicated that the man had worked somewhere as a porter, using the putty to scrape chewing gum from the floor and the pumice stone for cleaning his hands.
They tried soap and water, earth and a scrubbing brush, and lastly a pumice stone and lye, but they could not remove the crosses.
Dropping the coarse pumice stone, she backed out on her knees and glared at the woman next to her.