Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun niacin

1 sense of niacin

Sense 1
niacin, nicotinic acid -- (a B vitamin essential for the normal function of the nervous system and the gastrointestinal tract)
       => B-complex vitamin, B complex, vitamin B complex, vitamin B, B vitamin, B -- (originally thought to be a single vitamin but now separated into several B vitamins)