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urea

[yoo-ree-uh, yoo r-ee-uh] /yʊˈri ə, ˈyʊər i ə/
noun
1.
Biochemistry. a compound, CO(NH 2) 2 , occurring in urine and other body fluids as a product of protein metabolism.
2.
Chemistry. a water-soluble powder form of this compound, obtained by the reaction of liquid ammonia and liquid carbon dioxide: used as a fertilizer, animal feed, in the synthesis of plastics, resins, and barbiturates, and in medicine as a diuretic and in the diagnosis of kidney function.
Also called carbamide.
Origin
1800-1810
1800-10; < New Latin < French urée; ultimately < Greek oûron urine or oureîn to urinate; see uro-1
Related forms
ureal, ureic, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ureal

urea

/ˈjʊərɪə/
noun
1.
a white water-soluble crystalline compound with a saline taste and often an odour of ammonia, produced by protein metabolism and excreted in urine. A synthetic form is used as a fertilizer, animal feed, and in the manufacture of synthetic resins. Formula: CO(NH2)2 Also called carbamide
Derived Forms
ureal, ureic, adjective
Word Origin
C19: from New Latin, from French urée, from Greek ouronurine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for ureal

urea

1806, Latinized from French urée (1803), from Greek ouron "urine" (see urine).

Online Etymology Dictionary, © 2010 Douglas Harper
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ureal in Medicine

urea u·re·a (yu-rē'ə)
n.
A water-soluble compound that is the major nitrogenous end product of protein metabolism and is the chief nitrogenous component of the urine in mammals and other organisms. Also called carbamide.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ureal in Science
urea
  (y-rē'ə)   
The chief nitrogen-containing waste product excreted in the urine of mammals and some fish. It is the final nitrogenous product in the breakdown of proteins by the body, during which amino groups (NH2) are removed from amino acids and converted into ammonium ions (NH4), which are toxic at high concentrations. The liver then converts the ammonium ions into urea. Urea is also made artificially for use in fertilizers and medicine. Chemical formula: CON2H4.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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