a crystalline acid, C6H5NO2, 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.
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Origin of nicotinic acid
First recorded in 1885–90
Also called niacin, vitamin B3.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for nicotinic acid
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: (C 5 H 4 N)COOHAlso called: niacin
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
Medicine definitions for nicotinic acid
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for nicotinic acid
[ nĭk′ə-tĭn′ĭk, -tē′nĭk ]
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.