pumice /pum·ice/ (pum´is) a very light, hard, rough, porous, grayish powder consisting of silicates of aluminum, potassium, and sodium; used in dentistry as an abrasive.
pumice
pumice (pum´is),
pum·ice (p m  s)n. A light, porous, glassy lava, used as an abrasive. |
pumice
[pum′is]
Etymology: L, pumex
a finely divided volcanic rock used in powdered or solid form for smoothing or polishing surfaces.
pumice (pum´is),
n a type of volcanic glass used as an abrasive. It is prepared in various grits and is used for finishing and polishing in dentistry. It is also used in the polishing of natural teeth during a coronal polish but is being replaced by less abrasive synthetic particles in some polishing pastes. See also polishing, coronal.
pumice
a substance consisting of silicates of aluminum, potassium and sodium; used in dentistry as an abrasive.
pumice-stone lung
microlithiasis alveolaris pulmonum.
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