D defs.my
Entry 1 sense Webster, 1913

nicotinic acid

· nic·o·tin·ic ac·id · IPA
01 n. An organic acid (C6H5NO2), a carboxylated derivative of pyridine, obtained by the oxidation of nicotine; called also niacin and antipellagr…
  1. 1.
    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.(Chem.) Also: niacin, antipellagra vitamin, vitamin B<sub>5</sub>