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a steroid having ketone groups on functional carbon atoms.
17-k's steroids found in normal urine and in excess in certain tumors, which have a ketone group on the 17th carbon atom, and include certain androgenic and adrenocortical hormones.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
A steroid, such as androsterone or estrone, that contains a ketone group.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
ketosteroidA steroid hormone to which an oxygen molecule has been attached, especially at the 17th carbon atom (C-17). An oxosteroid. A 17-ketosteroid is a steroid with a C-O (carbonyl) group at C-17. 17-ketosteroids are excreted in the urine as breakdown products of ANDROGENS and are present in excess in adrenal and gonadal overactivity.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005