Niacin Definition
nīə-sĭn
noun
Webster's New World
A white crystalline acid, C6 H5 NO2 , of the vitamin B complex that is found in meat, wheat germ, dairy products, and yeast and is used to treat and prevent pellagra.
American Heritage
Synonyms:
Origin of Niacin
ni(cotinic) ac(id) –in
From American Heritage Dictionary of the English Language, 5th Edition
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