Pic"o*line (?), n. [L. pix, picis, pitch + oleum oil + -ine.] 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.
© Webster 1913.