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tho•ri•a



Pronunciation: (thôr'ē-u, thōr'-), [key]
—n. Chem.
a white, heavy, water-insoluble powder, ThO2, used chiefly in incandescent mantles, as the Welsbach gas mantle. Also called tho'rium ox'ide, tho'rium diox'ide.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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