Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of three isomeric liquids, C6H7N, related to pyridine and derived from coal tar, horse urine, and rendered bones, that are variously used as industrial solvents, waterproofing agents, intermediates in dyes and resins, and in the synthesis of picolinic acid and niacin.

from The Century Dictionary.

  • noun Methylpyridine, C5H4-N.CH3, an oily basic liquid formed by the dry distillation of coal, and also made synthetically.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) 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 Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun organic chemistry Any of three isomeric methyl derivatives of pyridine, analogous to toluene

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin pix, pic-, pitch + –ol + –ine.]

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