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noun, Biochemistry.
a crystalline acid, C 6 H 5 NO 2 , that is a component of the vitamin-B complex, found in fresh meat, yeast, etc., produced by the oxidation of nicotine, and used in the prevention and treatment of pellagra.
a vitamin of the B complex that occurs in milk, liver, yeast, etc. Lack of it in the diet leads to the disease pellagra. Formula: (C5H4N)COOH Also called niacin

nicotinic acid n.
See niacin.
nicotinic acid
(nĭk’ə-tĭn’ĭk, -tē’nĭk)
See niacin.


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