Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of nicotine is as below...

Nicotine :: Nicotine (n.) An alkaloid which is the active principle of tobacco. It is a colorless, transparent, oily liquid, having an acrid odor, and an acrid burning taste. It is intensely poisonous..

Pyridine :: Pyridine (n.) A nitrogenous base, C5H5N, obtained from the distillation of bone oil or coal tar, and by the decomposition of certain alkaloids, as a colorless liquid with a peculiar pungent odor. It is the nucleus of a large number of organic substances, among which several vegetable alkaloids, as nicotine and certain of the ptomaines, may be mentioned. See Lutidine..

Nicotidine :: Nicotidine (n.) A complex, oily, nitrogenous base, isomeric with nicotine, and obtained by the reduction of certain derivatives of the pyridine group..

Isonicotine :: Isonicotine (n.) A crystalline, nitrogenous base, C10H14N2, isomeric with nicotine..

Nicotinic :: Nicotinic (a.) Pertaining to, or derived from, nicotine; nicotic; -- used specifically to designate an acid related to pyridine, obtained by the oxidation of nicotine, and called nicotinic acid..

Isonicotinic :: Isonicotinic (a.) Pertaining to, or derived from, isonicotine..

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