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niacin

/ˈnaɪəsən/
IPA guide

Definitions of niacin
  1. noun
    a B vitamin essential for the normal function of the nervous system and the gastrointestinal tract
    synonyms: nicotinic acid
    see moresee less
    type of:
    B, B complex, B vitamin, B-complex vitamin, vitamin B, vitamin B complex
    originally thought to be a single vitamin but now separated into several B vitamins
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