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|Noun||1.||plant toxin - any substance produced by plants that is similar in its properties to extracellular bacterial toxin|
nicotine - an alkaloid poison that occurs in tobacco; used in medicine and as an insecticide
strychnine - an alkaloid plant toxin extracted chiefly from nux vomica; formerly used as a stimulant
brucine - a bitter alkaloid poison resembling strychnine and extracted from nux vomica
hemlock - poisonous drug derived from an Eurasian plant of the genus Conium; "Socrates refused to flee and died by drinking hemlock"
toxin - a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species
mycotoxin - a toxin produced by a fungus