Look up: urea

1. Urea
   Urea is a crystalline substance, soluble in water which occurs in the urine of mammals, birds and reptiles. It was produced artificially by 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://fas.org/news/reference/probert/AC
   
   
2. Urea
   A non-protein nitrogen usually fed with molasses.
   Found on http://www.pestmanagement.co.uk/lib/glos
   
   
3. urea
   (Humans as organisms) a nitrogenous waste product resulting from the break down of proteins. It is excreted in urine
   Found on http://www.bbc.co.uk/schools/gcsebitesiz
   
   
4. urea
   [n] - the chief solid component of mammalian urine
   Found on http://www.webdictionary.co.uk/definitio
   
   
5. urea
   a soluble, weakly basic, nitrogenous compound used in the manufacture of resins and plastics.
   Found on http://www.workover.co.uk/og/u.htm
   
   
6. urea
   a soluble, weakly basic, nitrogenous compound used in the manufacture of resins and plastics.
   Found on http://www.workover.co.uk/og/v.htm
   
   
7. 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?l
   
   
8. Urea
   A waste product, derived from protein, that is excreted in the urine
   Found on http://www.paul_smith.doctors.org.uk/Arc
   
   
9. Urea
   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_condit
   
   
10. Urea
    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/docs/GLOSSA
    
    
11. Urea
    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.
    
    
12. urea
    chemically obtained fertilizer containing carbonyl diamide (carbamide) as its essential ingredient Category: agriculture, fisheries, forestry - food processing industries
    Found on http://www.mijnwoordenboek.nl/definition
    
    
13. urea
    The final nitrogenous excretion product of many organisms.
    Found on
    
    
14. urea
    <biochemistry> The final nitrogenous excretion product of many organisms. ... (18 Nov 1997) ...
    Found on http://cancerweb.ncl.ac.uk/cgi-bin/omd?u
    
    
15. 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 on http://wordnet.princeton.edu/perl/webwn?
    
    
16. Urea
    `Urea` is an organic compound with the chemical formula (NH2)2CO. Urea is also known as `carbamide`, especially in the recommended International Nonproprietary Names (rINN) in use in Europe. For example, the medicinal compound `hydroxyurea` (old British Approved Name) is now `hydroxycarbamide`. Other names include `carbamide resin`, `isourea`, `carbonyl diamide`, and `carbonyldiamine`. It was the first organic compound to be artificially synthe...
    Found on http://en.wikipedia.org/wiki/Urea
    
    
17. Urea
    `Urea` is an organic compound with the chemical formula (NH2)2CO. Urea is also known as `carbamide`, especially in the recommended International Nonproprietary Names (rINN) in use in Europe. For example, the medicinal compound `hydroxyurea` (old British Approved Name) is now `hydroxycarbamide`. Other names include `carbamide resin`, `isourea`, `carbonyl diamide`, and `carbonyldiamine`. It was the first organic compound to be artificially synthe...
    Found on http://en.wikipedia.org/wiki/Urea
    
    
18. 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.mercksource.com/pp/us/cns/cns
    
    
19. 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 on http://thinkexist.com/dictionary/meaning
    
    
20. 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
    
    
21. Urea
    CO(NH2)2 Molar mass: 60.05526
    Found on http://www.convertunits.com/molarmass/Ur
    
    
22. urea
    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 6/7 of the nitrogen excreted from the body). It may be obtained artificially by heating a solution of ammonium cyanate. It occurs as colorless or white p...
    Found on
    
    
23. 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
    
    
24. 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 on http://www.daviddarling.info/encyclopedi