- 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.
Origin of urea
Examples from the Web for urea
Historical Examples of urea
When boiled with baryta-water it decomposes into urea and ammonia.Poisons: Their Effects and Detection
Alexander Wynter Blyth
Urea is decreased in diseases of the liver with destruction of liver substance.
The amount of urea is normally about twice that of the chlorids.
Urea constitutes about one-half of all the solids, or about 30 gm.
Urea, when heated, gives off Ammonia, and becomes Cyanuric acid.The Action of Medicines in the System
Frederick William Headland
- 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
Word Origin for urea
1806, Latinized from French urée (1803), from Greek ouron "urine" (see urine).
- 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.carbamide
- 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.