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 (kē′tō-stĕr′oid′, -stîr′-)
A steroid, such as androsterone or estrone, that contains a ketone group.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌkiːtəʊˈstɪərɔɪd; ˌkiːtəʊˈstɛrɔɪd)
(Chemistry) any steroid containing a ketone group in its molecule
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(kɪˈtɒs təˌrɔɪd)

any of a group of steroids containing a ketone group.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ketosteroid - a steroid containing a ketone group
androsterone - an androgenic hormone that is less active than testosterone
estrone, Estronol, oestrone, theelin - a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency
cortisone, Cortone Acetate - a corticosteroid hormone (trade name Cortone Acetate) normally produced by the adrenal cortex; is converted to hydrocortisone
steroid - any of several fat-soluble organic compounds having as a basis 17 carbon atoms in four rings; many have important physiological effects
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Herschlag, "Evaluating the potential for halogen bonding in the oxyanion hole of ketosteroid isomerase using unnatural amino acid mutagenesis," ACS Chemical Biology, vol.
* Ketosteroid reductase, a key enzyme involved in proper digestion (i.e., it influences the production of bile acid biosynthesis).
This derivative was selected for its introduction of a positive charge into the molecule of ketosteroid 17OHP and for the ease of its synthesis (14).
AKR1C1 is a member of aldo-keto reductase superfamily and catalyzes the breakdown of aldehydes, ketones, monosaccharides, ketosteroids, and prostaglandins.