GNU Collaborative International Dictionary of English

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1.       
   acetone (ăsˈḗ‑tōn), n. [See Acetic.] (Chem.) A volatile liquid (CH3.CO.CH3); pyroacetic spirit; methyl ketone; -- obtained by fermentation, the distillation of certain acetates, or by the destructive distillation of citric acid, starch, sugar, or gum, with quicklime.   It is commonly used as a solvent.
   
   [1913 Webster +PJC]
   
   ☞ The term was once also applied to a number of bodies of similar constitution, more frequently called ketones. See Ketone.
   
   [1913 Webster +PJC]