allantoin

allantoin

[uh-lan-toh-in]
noun Biochemistry, Pharmacology.
a white powder, C 4 H 6 N 4 O 3 , produced by oxidation of uric acid and the major excretory product of purine degradation in many vertebrates: used medicinally to heal skin ulcers and in lotions, lipsticks, etc., for its soothing effect.

Origin:
1835–45; allanto(is) + -in2; so named because it is found in the fluid of the allantois

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To allantoin
Collins
World English Dictionary
allantoin (ˌælənˈtəʊɪn)
 
n
a substance derived from the secretions of snails and contained in some plants, used in skin care products and valued for its soothing properties
 
[C19: from allantois]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

allantoin al·lan·to·in (ə-lān'tō-ĭn)
n.

  1. A substance present in allantoic fluid, amniotic fluid, and fetal urine.

  2. A crystalline oxidation product of uric acid produced in vertebrate purine metabolism and used medicinally to promote tissue growth.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Related Words
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;