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stannic oxide

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noun Chemistry.
  1. a white, amorphous, water-insoluble powder, SnO2, used chiefly in the manufacture of ceramic glazes and glass, and of polishing powders for metal, glass, and marble.
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Origin of stannic oxide

First recorded in 1840–50
Also called tin ash.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018