#poisonous_substance__poisonoussubstance__poison  any substance that causes injury or illness or death of a living organism
  supertype:  substance__matter  that which has mass and occupies space; "an atom is the smallest indivisible unit of matter"
  subtype:  atropine  a poisonous crystalline alkaloid extracted from the nightshade family; used as an antispasmodic and to dilate the eye pupil
     subtype:  belladonna  an alkaloidal extract or tincture of the poisonous belladonna herb that is used medicinally
  subtype:  hyoscyamine  a poisonous crystalline alkaloid (isometric with atropine but more potent); used to treat excess motility of the gastrointestinal tract
  subtype:  toxin  a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species
     subtype:  animal_toxin__zootoxin  a toxin resembling bacterial toxins in its antigenic properties that is found in the fluids of certain animals
        subtype:  venom  toxin secreted by animals (by certain snakes and poisonous insects (e.g., spiders and scorpions))
           subtype:  kokoi_venom__kokoivenom  a potent neurotoxin found in a particular frog
           subtype:  snake_venom__snakevenom  venom secreted by certain snakes
     subtype:  bacterial_toxin__bacterialtoxin  any endotoxin or exotoxin formed in or elaborated by bacterial cells
        subtype:  anatoxin__toxoid  a bacterial toxin that has been weakened until it is no longer toxic but is strong enough to induce the formation of antibodies and immunity to the specific disease caused by the toxin; "diphtheria toxoid"
        subtype:  botulin__botulinus_toxin__botulismotoxin  potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism
     subtype:  cytotoxin  any substance that has a toxic effect on cells
     subtype:  endotoxin  a toxin that is confined inside the microorganisms and is released only when the microorganisms are broken down or die
     subtype:  exotoxin  a toxin that is secreted by microorganisms into the surrounding medium
     subtype:  neurotoxin__neurolysin  any toxin that affects neural tissues
        subtype:  saxitoxin  a powerful neurotoxin produced by certain dinoflagellates found in red tides; it can accumulate in mollusks that feed on the dinoflagellates and cause food poisoning to humans
        subtype:  kokoi_venom__kokoivenom  a potent neurotoxin found in a particular frog
     subtype:  plant_toxin__planttoxin__phytotoxin  any substance produced by plants that is similar in its properties to extracellular bacterial toxin
        subtype:  nicotine  an alkaloid poison that occurs in tobacco; used in medicine and as an insecticide
        subtype:  strychnine  an alkaloid plant toxin extracted chiefly from nux vomica; formerly used as a stimulant
        subtype:  brucine  a bitter alkaloid poison resembling strychnine and extracted from nux vomica
        subtype:  hemlock.plant_toxin  poisonous drug derived from an Eurasian plant of the genus Conium; "Socrates refused to flee and died by drinking hemlock"
        subtype:  tubocurarine__curare  a toxic alkaloid found in certain tropical South American trees that is a powerful relaxant for striated muscles; used by South American indians as an arrow poison; "curare acts by blocking cholinergic transmission at the myoneural junction"

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