picoline

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.

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

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.

Any of three isomeric methyl derivatives of pyridine, analogous to toluene