UREA
\jʊ͡əɹˈi͡ə], \jʊəɹˈiə], \j_ʊə_ɹ_ˈiə]\
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the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
By Princeton University
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the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
By DataStellar Co., Ltd
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A compound formed in the liver from ammonia produced by the deamination of amino acids. It is the principal end product of protein catabolism and constitutes about one half of the total urinary solids.
By DataStellar Co., Ltd
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A nitrogenous excretory substance, the chief constituent of urine.
By Henderson, I. F.; Henderson, W. D.
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A white crystalline substance, CON2H4, from urine, etc.
By Willam Alexander Newman Dorland
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Carbamid, or rather carboxyldiamin, CO (NH2)2, the chief solid constituent of the urine and the principal excretory product containing nitrogen. It is also present in the blood, bile, liver, and muscle. It forms long, colorless, prismatic crystals, melting at 132C, soluble in water and in alcohol. It acts as a base, forming addition compounds with acids and their salts and with metallic oxids. It is decomposed by heat and moisture, and more slowly by the action of bacteria into normal ammonium carbonate. This process takes place in the urine, constituting its so-called alkaline fermentation and giving to stale urine its peculiar strong ammoniacal odor. U. is also decomposed into cyanogen compounds (cyanuric acid biuret) by the action of dry heat. It is remarkable as being the first organic body that was prepared artificially; Wohler having accomplished this in 1828 by making the isomeric cyanate of ammonium, and then transforming the latter into u. by allowing it to stand in an alcoholic solution. It has been used medicinally in pulmonary tuberculous disease, and it is an active non-toxic diuretic, which is rapidly eliminated.
By Smith Ely Jelliffe
