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pumice

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pumice

 [pum´is]
a substance consisting of silicates of aluminum, potassium, and sodium; used in dentistry as an abrasive.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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]
Farlex Partner Medical Dictionary © Farlex 2012

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]
Medical Dictionary for the Dental Professions © Farlex 2012
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References in periodicals archive
strong brown at base and very dusky red (2.5YR 2.5/4) at top, clay; < 5% sub-rounded coarse fragments up to 70 mm; very sticky, very plastic, very firm; strongly developed 10-100 mm blocky breaking to crumb structure; thin waxy chocolate coloured argillans on larger aggregates and in voids and root channels; > 2%, 1-5 mm tubular pores; few 1-10 mm vertical and horizontal, fine and coarse roots; gradational, smooth boundary with large lenses and vertical channels up to 15 cm across of younger pumiceous tephra from above extending down into this horizon; rare sub-rounded stones up to 70 cm.
Pleistocene colonisation of the Bismarck Archipelago: new evidence from West New Britain
Champion has found that the quickly cooled pumiceous ash deposits contain essentially one kind of self-reversing titanohematite, whereas lava that cooled slowly in the domes at the surface contains a potpourri of differently composed titanohematites.
Self-reversing minerals make a comeback
The Awaiti sandy loam is developed from thin Tarawera tephra on fine pumiceous alluvium, chiefly derived from Kaharoa Ash and is moderately well drained.
Changes in characteristics of soils irrigated with processing wastewater from three New Zealand dairy factories
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