noun Chemistry.
a salt or ester of sulfurous acid.
any sulfite-containing compound, especially one that is used in foods or drug products as a preservative and that can cause severe allergic reactions in susceptible individuals: use in fresh fruits and vegetables banned by the FDA in 1986.

1780–90; sulf(ur) + -ite1

sulfitic [suhl-fit-ik] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

sulfite sul·fite (sŭl'fīt')
A salt or an ester of sulfurous acid.

sul·fit'ic (-fĭt'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
sulfite   (sŭl'fīt')  Pronunciation Key 
A salt or ester of sulfurous acid, containing the group SO3.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
In such instances, the sulfite notice will be the only difference in the two labels.
After developing, the film needed to be rinsed in sodium sulfite, washed in water and hung up to dry.
Experts believe the reports represent only a small segment of the sulfite sensitivity situation.
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