Definition: Having the properties of a narcotic; operating as a
Definition: A drug which, in medicinal doses, generally allays morbid
susceptibility, relieves pain, and produces sleep; but which, in
poisonous doses, produces stupor, coma, or convulsions, and, when given
in sufficient quantity, causes death. The best examples are opium (with
morphine), belladonna (with atropine), and conium.