| a crystalline acid, C6H5NO2, that is a component of the vitamin-B complex, found in fresh meat, yeast, etc., produced by the oxidation of nicotine, and used in the prevention and treatment of pellagra. |
ni·a·cin  (nī'ə-sĭn)  n. A white crystalline acid, C5H4NCOOH, that is a component of the vitamin B complex found in meat, wheat germ, dairy products, and yeast and is used to treat and prevent pellagra. Also called nicotinic acid. [ni(cotinic) ac(id) + -in.] |
| nicotinic acid n. See niacin. [So called because it is often obtained by oxidizing nicotine.] |
nicotinic acid n.
See niacin.
