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[suhl-fok-sahyd] /sʌlˈfɒk saɪd/
noun, Chemistry
a brown liquid, C 1 8 H 2 8 O 3 S, insoluble in water, used as an insecticide synergist.
any of the compounds with the radical =SO, as dimethyl sulfoxide, (CH 3) 2 SO.
1890-95; sulf- + oxide Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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sulfoxide in Medicine

sulfoxide sulf·ox·ide (sŭl-fŏk'sīd')
Any of various compounds that contain a sulfinyl group.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for sulfoxide

any of a class of organic compounds containing sulfur and oxygen and having the general formula (RR') SO, in which R and R' are a grouping of carbon and hydrogen atoms. The sulfoxides are good solvents for salts and polar compounds.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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