poisonous substance

Definitions of poisonous substance
  1. noun
    any substance that causes injury or illness or death of a living organism
    synonyms: poison, toxicant
    see moresee less
    types:
    show 14 types...
    hide 14 types...
    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 insecticides
    hyoscyamine
    a poisonous crystalline alkaloid (isometric with atropine but more potent); used to treat excess motility of the gastrointestinal tract
    toxin
    a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species
    belladonna
    an alkaloidal extract or tincture of the poisonous belladonna plant that is used medicinally
    ricin, ricin toxin
    a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon
    animal toxin, zootoxin
    a toxin resembling bacterial toxins in its antigenic properties that is found in the fluids of certain animals
    bacterial toxin
    any endotoxin or exotoxin formed in or elaborated by bacterial cells
    cytotoxin
    any substance that has a toxic effect on cells
    endotoxin
    a toxin that is confined inside the microorganisms and is released only when the microorganisms are broken down or die
    exotoxin
    a toxin that is secreted by microorganisms into the surrounding medium
    hepatotoxin
    any toxin that affects the liver
    nephrotoxin
    any toxin that affects the kidneys
    neurolysin, neurotoxin
    any toxin that affects neural tissues
    phytotoxin, plant toxin
    any substance produced by plants that is similar in its properties to extracellular bacterial toxin
    type of:
    substance
    a particular kind or species of matter with uniform properties
Word Family
EDITOR’S CHOICE

Test prep from the experts

Boost your test score with programs developed by Vocabulary.com’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.

SAT/PSAT

$29.95
  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week

TOEFL

$29.95
  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week