noun Chemistry.
a colorless, volatile, water-soluble, flammable liquid, C 3 H 6 O, usually derived by oxidation of isopropyl alcohol or by bacterial fermentation of carbohydrates: used chiefly in paints and varnishes, as a general solvent, and in organic synthesis.
Also called dimethylketone.

1830–40; acet- + -one

acetonic [as-i-ton-ik] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
acetone (ˈæsɪˌtəʊn)
Systematic name: propanone a colourless volatile flammable pungent liquid, miscible with water, used in the manufacture of chemicals and as a solvent and thinner for paints, varnishes, and lacquers. Formula: CH3COCH3
[C19: from German Azeton, from aceto- + -one]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1839, colorless volatile liquid, from L. acetum "vinegar" (see acetic) + Gk. suffix -one, lit. "female descendant."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

acetone ac·e·tone (ās'ĭ-tōn')

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

  2. An organic compound produced in excessive amounts in diabetic acidosis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
acetone   (ās'ĭ-tōn')  Pronunciation Key 
A colorless, volatile, extremely flammable liquid ketone that is widely used as a solvent, for example in nail-polish remover. Chemical formula: C3H6O.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Clean residue before it cures, with alcohol or acetone.
And then it was lights out, the sharp smell of acetone lingering in the
Conservators cleaned it with a solution of water and acetone, removing
  contaminants and reducing acidity in the fabric.
Ammonia may be a sign of renal failure and elevated acetone levels can indicate
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