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nitrogenous waste
Any metabolic waste product that contains nitrogen. Urea and uric acid are the most common nitrogenous waste products in terrestrial animals; freshwater fish excrete ammonia and marine fish excrete ...
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The Oxford Dictionary of Sports Science & Medicine (3 ed.)
Products of metabolism that are eliminated from the body. Some waste products, such as lactic acid, may be harmful if they accumulate in the body. ...