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sulfoxide

[suhl-fok-sahyd]
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noun Chemistry.
  1. a brown liquid, C18H28O3S, insoluble in water, used as an insecticide synergist.
  2. any of the compounds with the radical =SO, as dimethyl sulfoxide, (CH3)2SO.
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Origin of sulfoxide

First recorded in 1890–95; sulf- + oxide
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
sulfoxide in Medicine

sulfoxide

(sŭl-fŏk′sīd′)
n.
  1. Any of various compounds that contain a sulfinyl group.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.