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uric acid

noun
1.
Biochemistry. a compound, C 5 H 4 N 4 O 3 , present in mammalian urine in small amounts, and the principal nitrogenous component of the excrement of reptiles and birds, that in the form of its salts occurs in the joints in gout and as the major constituent of kidney stones.
2.
Chemistry. a white, crystalline, odorless, tasteless, very slightly water-soluble powder form of this compound, obtained chiefly from urine or bird excrement or synthesized, used chiefly in organic synthesis.
Origin
1790-1800
1790-1800
Related forms
uric-acid, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for uric acid
  • In healthy birds, uric acid is excreted by the kidneys and is seen as the white material in their droppings.
  • Gout is painful inflammation caused by a buildup of microscopic crystals of uric acid in the joints.
  • Gout, a common form of arthritis, is caused by uric acid buildup in blood.
  • It is caused by a buildup of uric acid in the joint, a metabolic byproduct of protein.
  • uric acid is a chemical created when the body breaks down substances called purines.
  • Gout is a kind of arthritis that occurs when uric acid builds up in blood and causes joint inflammation.
  • Gout is a disease involving uric acid deposits in the joints.
  • From the kidneys, uric acid leaves the body in the urine.
  • Allopurinol relieves gout by blocking the formation of uric acid in the joints.
  • People with larger body sizes may excrete more calcium and uric acid, which increase the risk of kidney stone formation.
British Dictionary definitions for uric acid

uric acid

noun
1.
a white odourless tasteless crystalline product of protein metabolism, present in the blood and urine; 2,6,8-trihydroxypurine. Formula: C5H4N4O3
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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uric acid in Medicine

uric acid n.
A semisolid compound that is a nitrogenous end product of protein and purine metabolism and is a nitrogenous component of urine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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uric acid in Science
uric acid
  (yr'ĭk)   
The chief nitrogen-containing waste product excreted in the urine of birds, insects, and most reptiles. It is produced by the breakdown of amino acids in the liver. Uric acid is also produced in small quantities in humans by the breakdown of purines, and elevated levels in the blood can lead to gout. Chemical formula: C5H4N4O3.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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