Table of Contents POS
HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
THESAURUS

WORDNET DICTIONARY

Noun niacin has 1 sense

• niacin(n = noun.substance) nicotinic acid - a B vitamin essential for the normal function of the nervous system and the gastrointestinal tract; Array
is a kind of b, b-complex vitamin, b complex, b vitamin, vitamin b, vitamin b complex

CIDE DICTIONARY

OXFORD DICTIONARY

THESAURUS

niacin

adermin, aneurin, antiberi-beri factor, ascorbic acid, axerophthol, biotin, carotene, cholecalciferol, choline, cobalamin, cryptoxanthin, cyanocobalamin, ergocalciferol, folic acid, hepatoflavin, inositol, lactoflavin, menadione, naphthoquinone, nicotinic acid, ovoflavin, pyridoxine, tocopherol, vitamin, vitamin B, vitamin Bc, vitamin D, vitamin G, vitamin H, vitamin K, vitamin M

For further exploring for "niacin" in Webster Dictionary Online