Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

ket(o)- Also keton-.

Ketone.

[English ketone.]

Ketones are organic chemical compounds that contain a carbonyl group —CO— bonded to two alkyl groups and whose names have the systematic ending -one. The production of ketones during the metabolism of fats is termed ketogenesis; ketosis is the presence of raised levels of ketones in the body. The form sometimes appears as keton- before a vowel, as in phenylketonuria, an inherited inability to metabolize phenylalanine.

In chemistry, a keto acid is a compound whose molecule contains both a carboxyl group (—COOH) and a ketone group, such as α–ketoglutaric acid, which occurs in the metabolism of proteins; ketamine is a synthetic compound used as an anaesthetic and analgesic drug and also (illicitly) as an hallucinogen.

Visit Michael Quinion’s World Wide Words site for 2000+ articles on English!

Copyright © Michael Quinion 2008–. All rights reserved. Page last updated 23 September 2008.
Your comments and suggestions on the site are very welcome.