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2 definitions found
 for Ketone
From The Collaborative International Dictionary of English v.0.48 :

  Ketone \Ke"tone\ (k[=e]"t[=o]n), n. [Cf. Acetone.] (Chem.)
     One of a large class of organic substances resembling the
     aldehydes, obtained by the distillation of certain salts of
     organic acids and consisting of carbonyl ({CO) united with
     two hydrocarbon radicals. In general the ketones are
     colorless volatile liquids having a pungent ethereal odor.
     [1913 Webster]
  
     Note: The ketones are named by adding the suffix-one to the
           stems of the organic acids from which they are
           respectively derived; thus, acetic acid gives acetone;
           butyric acid, butyrone, etc.
           [1913 Webster]

From WordNet (r) 3.0 (2006) :

  ketone
      n 1: any of a class of organic compounds having a carbonyl group
           linked to a carbon atom in each of two hydrocarbon radicals

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