| Nicotine (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. Thesaurus Entries 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 |