GNU Collaborative International Dictionary of English

Found 2 definitions

1.       
   nicotinic acid (?), n. (Chem.) An organic acid (C6H5NO2), a carboxylated derivative of pyridine, obtained by the oxidation of nicotine; called also niacin and antipellagra vitamin, and vitamin B5.  Chemically it is 3-pyridinecarboxylic acid. It is a cofactor in several enzymatic reactions, and is used to prevent a pellagra-like disease in dogs. [MI11]
   
   Syn. -- 3-pyridinecarboxylic acid, niacin, antipellagra vitamin.
   [1913 Webster +PJC]
   
   
         
       

2.       
   vitamin B5 n. See nicotinic acid.
   
   Syn. -- nicotinic acid.
   
   [PJC]