10. 
    urea
    carbamide noun the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
    Found op http://wordnetweb.princeton.edu/perl/webwn?s=urea
    
    
11. 
    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 ...
    Found op http://www.encyclo.co.uk/local/21001
    
    
12. 
    Urea
    • (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 op http://thinkexist.com/dictionary/meaning/urea/
    
    
13. 
    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 op http://www.britannica.com/eb/a-z/u/17
    
    
14. 
    Urea
    CO(NH2)2 Molar mass: 60.05526
    Found op http://www.convertunits.com/molarmass/Urea
    
    
15. 
    Urea
    Urea or carbamide is an organic compound with the chemical formula CO(NH2)2. The molecule has two —NH2 groups joined by a carbonyl (C=O) functional group. Urea serves an important role in the metabolism of nitrogen-containing compounds by animals and is the main nitrogen-containing substance in t...
    Found op http://en.wikipedia.org/wiki/Urea
    
    
16. 
    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 op http://www.pfa.org/jifsg/jifsgs15.html
    
    
17. 
    urea
    A white crystalline solid, CO(NH₂)₂, 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 op http://www.daviddarling.info/encyclopedia/U/urea.html
    
    
18. 
    urea
    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 op http://www.infoplease.com/ce6/sci/A0850181.html
    
    
19. 
    Urea
    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 op http://www.kidney.org.au/KidneyDisease/KidneyGlossary/tabid/679/Default.xht
    
    
20. 
    Urea
    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 op http://www.probertencyclopaedia.com/browse/GU.HTM
    
    
21. 
    urea
    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 fro...
    Found op http://www.medilexicon.com/medicaldictionary.php?t=95854
    
    
22. 
    urea
    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 resin...
    Found op http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0010213.html
    
    

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