|  
| 
 
 
 Meaning of NIACIN
| Pronunciation: |  | 'nIusin 
 
 |  |  WordNet Dictionary |  |  |  |  | Definition: |  | [n]  a B vitamin essential for the normal function of the nervous system and the gastrointestinal tract |  |  |  |  | Websites: |  |  |  |  |  |  | Synonyms: |  | nicotinic acid |  |  |  |  | See Also: |  | B, B complex, B vitamin, B-complex vitamin, vitamin B, vitamin B complex |  |     |  |  Biology Dictionary |  |  |  |  | Definition: |  | This vitamin is necessary for the synthesis of various enzymes and acts  to reduce blood cholesterol.  A  deficiency in this vitamin causes pellagra, which is characterized by  dermatitis, diarrhea, and inflammation of the mucous membranes. |  |  |  |  Thesaurus Terms |  |  |  |  | Related Terms: |  | adermin, aneurin, antiberi-beri factor, ascorbic acid, axerophthol, biotin, carotene, cholecalciferol, choline, cobalamin, cryptoxanthin, cyanocobalamin, ergocalciferol, folic acid, hepatoflavin, inositol, lactoflavin, menadione, naphthoquinone, ovoflavin, pyridoxine, tocopherol, vitamin, vitamin B, vitamin Bc, vitamin D, vitamin G, vitamin H, vitamin K, vitamin M |  |  |  |     |    |  |