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sulfonmethane

(sŭl′fōn-mĕthān′, -fŏn-)
n.
  1. A colorless crystalline or powdered compound used medicinally as a hypnotic.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.