Poisonous_substanceWordNet Explorer

any substance that causes injury or illness or death of a living organism

a particular kind or species of matter with uniform properties

a poisonous crystalline alkaloid extracted from the nightshade family; used as an antispasmodic and to dilate the eye pupil; also administered in large amounts as an antidote for organophosphate nerve agents or organophosphate insecticides

a poisonous crystalline alkaloid (isometric with atropine but more potent); used to treat excess motility of the gastrointestinal tract

a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species