pumice
Word family adjectivepumiceousnounpumice
pum·ice /ˈpʌmɪs/ (also pumice stone) noun 2. [countableC]DCB a piece of pumice stone that you rub on your skin to clean it or make it soft 〔一块〕浮石〔用于清洁皮肤或磨擦皮肤使其柔滑〕 pumice• Treat calluses by rubbing with a callus file, a pumice stone, or a hard-skin remover.• You should file calluses and corns with a pumice stone, but never cut them with sharp instruments.• If such vesicles are extremely abundant pumice is formed.• The hardest, pumice, is used in a number of proprietary compounds.• No pumice will float indefinitely, though.• The combustion melts the pumice, the hot gases foam it up, and the hot foam fills the mould in seconds.• This situation is changing, though, and some interesting things are now being done with pumice deposits. Origin pumice (1400-1500) Old French pomis, from Latin pumex “foam”