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Dictionary

sul'fur triox'ide

Chem.
an irritant, corrosive, low-melting solid, SO₃, obtained by the oxidation of sulfur dioxide, used as an intermediate in the manufacture of sulfuric acid. Also called sulfuric anhydride.

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

sulfur spring

sulfuryl

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