(n.) An alkaloid which is the active principle of tobacco. It is a colorless, transparent, oily liquid, having an acrid odor, and an acrid burning taste. It is intensely poisonous.

DDD DDT Paris green antimony arsenic trioxide beryllium bichloride of mercury cadmium carbolic acid carbon monoxide carbon tetrachloride chlorine cyanide hydrocyanic acid hyoscyamine lead mercuric chloride mercury mustard gas nicotine phenol poison gas prussic acid selenium strychnine