allantoin

[uh-lan-toh-in]

al·lan·to·in

[uh-lan-toh-in]
noun Biochemistry, Pharmacology.
a white powder, C4H6N4O3, 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
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Allantoin is always a great word to know.
So is plutonium. Does it mean:
Symbol: Nd; atomic weight: 144.24; atomic number: 60
Symbol: Pu; atomic weight: 242; atomic number: 94
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
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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.
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