poisonous substance

Thesaurus

Noun

1.

poisonous substance - any substance that causes injury or illness or death of a living organismpoison, toxicantsubstance - a particular kind or species of matter with uniform properties; "shigella is one of the most toxic substances known to man"atropine - 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 insecticideshyoscyamine - a poisonous crystalline alkaloid (isometric with atropine but more potent); used to treat excess motility of the gastrointestinal tracttoxin - a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species