Dictionary![]() ![]() sul'furous ac'idChem. a colorless liquid, H2SO3, having a suffocating odor, obtained by dissolving sulfur dioxide in water, known mainly by its salts, which are sulfites: used chiefly in organic synthesis and as a bleach. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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