The final nitrogenous excretion product of many organisms.
A waste product, derived from protein, that is excreted in the urine
a soluble, weakly basic, nitrogenous compound used in the manufacture of resins and plastics.
(Humans as organisms) a nitrogenous waste product resulting from the break down of proteins. It is excreted in urine
A non-protein nitrogen usually fed with molasses.
- the chief solid component of mammalian urineFound on http://www.webdictionary.co.uk/definition.php?query=urea
a waste product of the metabolism of proteins that is formed by the liver and secreted by the kidneys Found on http://www.medichecks.com/glossary.cfm?ltr=U
The main end product of protein metabolism, which circulates in the blood and is eliminated from the body by the kidneys
Found on http://www.dwp.gov.uk/medical/med_conditions/glossary.html
A colourless crystalline substance which exists in blood and tissue fluids and which is produced by protein metabolism and excreted in urine.
Found on http://www.gadsbywicks.co.uk/uploaded/3822.pdf
Urea: A nitrogen-containing substance normally cleared from the blood by the kidney into the urine. Diseases that compromise the function of the kidney often lead to increased blood levels of urea, as measured by the blood urea nitrogen (BUN) test. Urea is of major historical significance. It was the first organic chemical compound ever synthesized...Found on http://www.medterms.com/script/main/art.asp?articlekey=5905
<biochemistry> The final nitrogenous excretion product of many organisms. ... (18 Nov 1997) ... Found on http://www.encyclo.co.uk/local/20973
the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plasticsFound on http://wordnetweb.princeton.edu/perl/webwn?s=urea
(u-re´ә) a substance found in urine, blood, and lymph, the chief nitrogenous constituent of urine, and the primary nitrogenous end-product of protein metabolism; it is formed in the liver from amino acids or ammonia compounds. The amount of urea in the urine increases both as tissues undergo disintegration and repair, a...Found on http://www.encyclo.co.uk/local/21001
• (a.) A very soluble crystalline body which is the chief constituent of the urine in mammals and some other animals. It is also present in small quantity in blood, serous fluids, lymph, the liver, etc.Found on http://thinkexist.com/dictionary/meaning/urea/
the diamide of carbonic acid. Its formula is H2NCONH2. Urea has important uses as a fertilizer and feed supplement, as well as a starting material ... [13 related articles]Found on http://www.britannica.com/eb/a-z/u/17
CO(NH2)2 Molar mass: 60.05526Found on http://www.convertunits.com/molarmass/Urea
Urea is a by product of the water-toluene diisocyanate reaction during flexible polyurethane foam production. The urea forms short length polymer cross links between the long polyurethane chains, which adds firmness to the foam.Found on http://www.pfa.org/jifsg/jifsgs15.html
A white crystalline solid, CO(NH2
, soluble in water, which is a major excretion product of protein metabolism in mammals. It is found in urine and other body fluids. Urea was the first organic substance to be synthesized in the laboratory (see Wöh...Found on http://www.daviddarling.info/encyclopedia/U/urea.html
urea (yooē'u) , organic compound that is the principal end product of nitrogen metabolism in most mammals. Urea was the first animal metabolite to be isolated in crystalline form; its crystallization was described in the early 18th cent., and in 1773 it was noted that urea gave off ammonia...Found on http://www.infoplease.com/ce6/sci/A0850181.html
A waste product, which is made as the body breaks down protein. If you have a kidney problem, too much protein causes too much urea and can leave to:Found on http://www.kidney.org.au/KidneyDisease/KidneyGlossary/tabid/679/Default.xht
Urea is a crystalline substance, soluble in water which occurs in the urine of mammals, birds and reptiles. It was produced artificially by Friedrich Wohler in 1828 by evaporating an aqueous solution of ammonium cyanate. This was the first synthesis of an organic compound from inorganic materials.Found on http://www.probertencyclopaedia.com/browse/GU.HTM
Type: Term Pronunciation: yū-rē′ă Definitions: 1. The chief end product of nitrogen metabolism in mammals, formed in the liver by means of the Krebs-Henseleit cycle and excreted in normal adult human urine in the amount of about 32 g a day (about 85% of the nitrogen excreted from the body). It may be obtained artificially by he...Found on http://www.medilexicon.com/medicaldictionary.php?t=95854
Waste product formed in the mammalian liver when nitrogen compounds are broken down. It is filtered from the blood by the kidneys, and stored in the bladder as urine prior to release. When purified, it is a white, crystalline solid. In industry it is used to make urea-formaldehyde plastics (or resins), pharmaceuticals, and fertilizersFound on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0010213.html
the main excretion product of protein breakdown in mammals; it also occurs in some plants. Uric acid is the excretory product of birds, reptiles and insects. Urine is the fluid, containing urea or uric acid, made by vertebrates.Found on http://www.seafriends.org.nz/books/glossary.htm
Nitrogen-containing compound generated by the breakdown of ingested proteins.Found on http://www.thehorse.com/Glossary.xhtml?L=U
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