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Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

  1. n. A colorless, volatile, extremely flammable liquid ketone, CH3COCH3, widely used as an organic solvent.

Century Dictionary and Cyclopedia

  1. n. A limpid mobile liquid, (CH3)2CO, with an agreeable odor and burning taste, produced by the destructive distillation of acetates. It is procured on a large scale from the aqueous liquid obtained in the dry distillation of wood.
  2. n. The general name of a class of compounds which may be regarded as consisting of two alcoholic radicals united by the group CO, or as aldehydes in which hydrogen of the group COH has been replaced by an alcoholic radical.

Wiktionary

  1. n. A colourless, volatile, flammable liquid ketone, (CH3)2CO, used as a solvent.
  2. n. A colourless, volatile, flammable liquid ketone, (CH3)2CO, used as a solvent.

GNU Webster's 1913

  1. n. A volatile liquid consisting of three parts of carbon, six of hydrogen, and one of oxygen; pyroacetic spirit, -- obtained by the distillation of certain acetates, or by the destructive distillation of citric acid, starch, sugar, or gum, with quicklime.

WordNet 3.0

  1. n. the simplest ketone; a highly inflammable liquid widely used as an organic solvent and as material for making plastics

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‘acetone’ has been looked up 950 times, added to 6 lists, and has a Scrabble score of 9.