stannic oxide

stannic oxide

noun Chemistry.
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.
Also called tin ash.


Origin:
1840–50
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Stannic oxide is always a great word to know.
So is alum. Does it mean:
a double sulfate analogous to potassium alum, as aluminum ammonium sulfate, with the formula R2SO4?X2(SO4)3?24H2O, where R is alkali metal or ammonium
any of a class of chemical compounds having the general formula ROH, where R represents an alkyl group and ?OH a hydroxyl group
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