allantoin(redirected from 3-ureidohydantoin)
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a crystalline substance from allantoic fluid and fetal urine, also produced synthetically; used as an astringent and keratolytic, often as a component in multi-ingredient dermatological medications.
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 substance present in allantoic fluid, fetal urine, and elsewhere; also an oxidation product of uric acid and the end product of purine metabolism in animals other than humans and the other primates.
Farlex Partner Medical Dictionary © Farlex 2012
An oxidation product of uric acid, C4H6N4O3, found in the urine of most mammals (except humans and related primates) as the metabolic end product of purine oxidation, and also found in some plants. It is also produced synthetically and is often used in cosmetics and pharmaceuticals.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
allantoinA drug used externally in the treatment of ACNE, usually in combination with other drugs.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
allantointhe heterocyclic end product of purine catabolism in some reptiles, and mammals other than primates.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005