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sulfoxide

[ suhl-fok-sahyd ]

noun

, Chemistry.
  1. a brown liquid, C 1 8 H 2 8 O 3 S, insoluble in water, used as an insecticide synergist.
  2. any of the compounds with the radical =SO, as dimethyl sulfoxide, (CH 3 ) 2 SO.

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Word History and Origins

Origin of sulfoxide1

First recorded in 1890–95; sulf- + oxide

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sulfonylsulfur

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