from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A semisolid compound, C5H4N4O3, that is a nitrogenous end product of protein and purine metabolism and is the chief nitrogenous component of the urine in birds, terrestrial reptiles, and insects.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a bicyclic heterocyclic phenolic compound, formed in the body by the metabolism of protein and excreted in the urine (or in avian faeces)
from the GNU version of the Collaborative International Dictionary of English
- adj. a crystalline body, present in small quantity in the urine of man and most mammals. Combined in the form of urate of ammonia, it is the chief constituent of the urine of birds and reptiles, forming the white part. Traces of it are also found in the various organs of the body. It is likewise a common constituent, either as the free acid or as a urate, of urinary or renal calculi and of the so-called gouty concretions. From acid urines, uric acid is frequently deposited, on standing in a cool place, in the form of a reddish yellow sediment, nearly always crystalline. Chemically, it is composed of carbon, hydrogen, nitrogen, and oxygen, C5H4N4O3, and by decomposition yields urea, among other products. It can be made synthetically by heating together urea and glycocoll. It was formerly called also lithic acid, in allusion to its occurrence in stone, or calculus.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a white tasteless odorless crystalline product of protein metabolism; found in the blood and urine
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