Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of a class of organic compounds, such as acetone, having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals and having the general formula R(CO)Rˌ, where R may be the same as Rˌ.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A homologous series of organic molecules whose functional group is an oxygen atom joined to a carbon atom—by a double bond—in a carbon-hydrogen based molecule.

from the GNU version of the Collaborative International Dictionary of English

  • n. 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.

from The Century Dictionary and Cyclopedia

  • n. A compound in which the carbonyl group CO unites two alcohol radicals: as, methyl-ethyl ketone, CH3.CO.C2H5.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any of a class of organic compounds having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals

Etymologies

German Keton, shortening and alteration of Aceton, acetone : Latin acētum, vinegar; see acetum + German -on, n. suff. (alteration of -en, from Greek -ēnē).
(American Heritage® Dictionary of the English Language, Fourth Edition)
From German keton, from German Aketon ("acetone"), from French acétone ("acetone"). See acetone. (Wiktionary)

Examples

  • These reactions are caused by enzymes, air or moulds (so - called ketone rancidity).

    1. Oil Plants and their Potential Use

  • _ [Greek: b] _-digallic acid by heating ethyl gallate with pyroracemic acid and sulphuric acid and proposed the so-called ketone-tannin formula: --

    Synthetic Tannins

  • In ketosis, the body starts breaking down whatever it can get its hands on - starting with fat, but moving on to proteins in muscle and organs - and creating byproducts called ketone bodies that will eventually reach toxic levels.

    Madison.com - top

  • We found terrible things like benzene, which affects the nervous system, carbon monoxide, toluene, methyl ethyl ketone, which is hazardous to human health at any level, and other carcinogens.

    TreeHugger

  • Yes, I am being careful, and also am drinking much water - I had a little resurgence of the feeling ketone-y yesterday, but much water was consumed.

    Thor's Day

  • Starting to get the ketone-breath thing less, which is good.

    Odin's Day

  • And the ketone-breath thing is gone, thanks to insane water consumption. * crosses fingers that kidneys are totally okay*

    Monday

  • The shake contains caprylic triglyceride, a compound derived from coconut oil that is metabolized in the liver to produce ketone bodies, which serve as alternate brain fuel for Alzheimer's patients, the company says.

    Fueling the Brain With a Milkshake

  • High-protein diets can stress your kidneys and, over the long term, lead to kidney damage, osteoporosis, gallstones and ketoacidosis, an unhealthy buildup of ketone bodies in the bloodstream.

    Gerard E. Mullin, M.D.: New Year, New Diet Confusion

  • The fire started just after 9pm on 3 August when a solvent used in making explosives, methyl ethyl ketone, burst into flames.

    Firefighters criticised after blaze at nuclear weapons plant

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