Definition of niacin

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  • niacin is a valid Scrabble US word with a point value of 8
  • niacin is a valid Scrabble UK word with a point value of 8
  • niacin is a valid Words with friends word with a point value of 11

Definition of niacin

  • a B vitamin essential for the normal function of the nervous system and the gastrointestinal tract (noun)

    Synonyms

    1. nicotinic acid

See definition of niacin in Merriam Webster