• WordNet 3.6
    • n pyridine a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal
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Webster's Revised Unabridged Dictionary
    • n Pyridine (Physiol. Chem) 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 ptoma├»nes, may be mentioned. See Lutidine.
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Century Dictionary and Cyclopedia
    • n pyridine A colorless liquid (C5H5N) of pungent odor, derived from coal-tar, and useful in allaying asthmatic paroxysms.
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Webster's Revised Unabridged Dictionary
From Gr. fire


In literature:

Indeed, Ladenberg has recently succeeded in obtaining benzol as an alteration product from pyridine, in certain reactions.
"Scientific American Supplement, No. 415, December 15, 1883" by Various
We may take piperidine and coniine as examples of the methods followed in alkaloidal synthesis; these are pyridine bases.
"Scientific American Supplement, No. 623, December 10, 1887" by Various
Pyridin is unquestionably present in tobacco smoke, and is a poisonous substance, although less so than nicotin.
"How to Live" by Irving Fisher and Eugene Fisk
Pyridin puriss 15 grammes Distilled water 100 c.c.
"The Elements of Bacteriological Technique" by John William Henry Eyre
Most of these are of a basic character, and belong to the pyridine and the quinoline series.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5" by Various
Reference will be made later on to the effects of nicotine and pyridine on the human system.
"Tobacco Leaves" by W. A. Brennan
The 1.5 diketones of this type, when heated with aqueous ammonia, form pyridine derivatives.
"Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 7" by Various

In science:

Triplet States via Intermediate Neglect of Differential Overlap: Benzene, Pyridine and the Diazines.
Shake-up and shake-off excitations with associated electron losses in X-ray studies of proteins