[ nik-uh-tin-uh-mahyd, -mid, -tee-nuh- ]
/ ˌnɪk əˈtɪn əˌmaɪd, -mɪd, -ˈti nə- /

noun Biochemistry.

a colorless, crystalline, water-soluble solid, C6H6N2O, the amide of nicotinic acid, and a component of the vitamin-B complex, found in meat, liver, fish, whole wheat, and eggs: used in medicine chiefly as an agent for preventing or treating human pellagra or animal black tongue.



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Also called niacinamide, nicotinic acid amide.

Origin of nicotinamide

First recorded in 1890–95; nicotine + amide Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for nicotinamide

/ (ˌnɪkəˈtɪnəˌmaɪd, -ˈtiːn-) /


the amide of nicotinic acid: a component of the vitamin B complex and essential in the diet for the prevention of pellagra. Formula: C 6 H 6 ON 2
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

Medical definitions for nicotinamide

[ nĭk′ə-tĭnə-mīd′, -tēnə- ]


The biologically active amide of niacin having similar vitamin activity and used in the prevention and treatment of pellagra.niacinamide
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.