| NOUN | substance | nicotinic acid, niacin | a B vitamin essential for the normal function of the nervous system and the gastrointestinal tract |
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| Meaning | A B vitamin essential for the normal function of the nervous system and the gastrointestinal tract. | |
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| Synonym | niacin | |
| Broader | B-complex vitamin, B complex, vitamin B complex, vitamin B, B vitamin, B | originally / originally thought to be a single vitamin but now separated into several B vitamins |
| Spanish | ácido nicotínico, niacina | |
| Catalan | àcid nicotínic, niacina | |
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