[ yoo-ree-uh, yoor-ee-uh ]
/ yʊˈri ə, ˈyʊər i ə /
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Biochemistry. a compound, CO(NH2)2, occurring in urine and other body fluids as a product of protein metabolism.
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.
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Also called carbamide.
Origin of urea
1800–10; <New Latin <French urée; ultimately <Greek oûron urine or oureîn to urinate; see uro-1
OTHER WORDS FROM ureau·re·al, u·re·ic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use urea in a sentence
Other factors being equal, the amount of urea indicates the activity of metabolism.
Crystals of urea nitrate or oxalate (Fig. 19) will soon appear and can be recognized with the microscope.
The urea was not increased and the relation of urea to total nitrogen remained the same.
No urea escapes by the skin, but many acids (probably fatty ones) are liberated by that organ.
This remedy was thought to convert uric acid into urea, and to so help elimination.
British Dictionary definitions for urea
/ (ˈjʊərɪə) /
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(NH 2) 2Also called: carbamide
Derived forms of ureaureal or ureic, adjective
Word Origin for urea
C19: from New Latin, from French urée, from Greek ouron urine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for urea
[ yu-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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.