pumice

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pumice

 [pum´is]
a substance consisting of silicates of aluminum, potassium, and sodium; used in dentistry as an abrasive.

pum·ice

(pŭm'is),
Volcanic cinders ground to particles of varying sizes; used in dentistry for polishing restorations or teeth; an abrasive.
[L. pumex (pumic-), a pumice stone]

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

[pum′is]
Etymology: L, pumex
a finely divided volcanic rock used in powdered or solid form for smoothing or polishing surfaces.

pum·ice

(pŭm'is)
Volcanic cinders ground to particles of varying sizes; used in dentistry for polishing restorations or teeth; an abrasive.
[L. pumex (pumic-), a pumice stone]

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.