from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of three isomeric liquids, C5H4N(CH3), derived from coal tar, horse urine, and bone oil and used as an industrial solvent.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of three isomeric methyl derivatives of pyridine, analogous to toluene
from the GNU version of the Collaborative International Dictionary of English
- n. Any one of three isometric bases (C6H7N) related to pyridine, and obtained from bone oil, acrolein ammonia, and coal-tar naphtha, as colorless mobile liquids of strong odor; -- called also methyl pyridine.
from The Century Dictionary and Cyclopedia
- n. Methylpyridine, C5H4-N.CH3, an oily basic liquid formed by the dry distillation of coal, and also made synthetically.
Besides his doctor's dissertation, about this period he published work on picoline and, in conjunction with Dobbie, on the decomposition products of the quinine alkaloids (1878-1879).
When nicotine vapor is passed through a red-hot tube, it yields essentially collidine, and, with this, some pyridine, picoline, lutidine, and gases such as hydrogen, marsh-gas, and ethylene.
Pyridine, picoline, lutidine, and collidine, the first four members of the pyridine series, have, moreover, all been formed synthetically, although the processes are not such as would yield the products as cheaply as they can be gotten from
In smoking, some of the nicotine is decomposed, forming pyridine, picoline, and other poisonous alkaloids.
In its synthesis 1,000 grammes of picoline were first converted into alphapicoline, 380 grammes being obtained.
Together, these projects provided a 35\% increase in capacity for beta picoline, a key raw material input used to produce 3-cyanopyridine and vitamin B3.