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niacin

American  
[nahy-uh-sin] / ˈnaɪ ə sɪn /

noun

Biochemistry.

  1. nicotinic acid.

niacin British  
/ ˈnaɪəsɪn /

noun

  1. another name for nicotinic acid

"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
niacin Scientific  
/ nī′ə-sĭn /

  1. A water-soluble organic acid belonging to the vitamin B complex that is important in carbohydrate metabolism. It is a pyridine derivative and is a precursor of the coenzyme NAD. Niacin is found in liver, fish, and whole-grain foods. Deficiency of niacin in the diet causes pellagra. Also called nicotinic acid. Chemical formula: C 6 H 5 NO 2 .

Etymology

Origin of niacin

First recorded in 1935–40; ni(cotinic) ac(id) + -in 2

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.