Noun

• S: (n) pumice, pumice stone (a light glass formed on the surface of some lavas; used as an abrasive)
• direct hypernym / inherited hypernym / sister term
• S: (n) rock, stone (material consisting of the aggregate of minerals like those making up the Earth's crust) "that mountain is solid rock"; "stone is abundant in New England and there are many quarries"
• derivationally related form

Verb

• S: (v) pumice (rub with pumice, in order to clean or to smoothen)