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  1. Dictionary
    toxin
    /ˈtɒksɪn/

    noun

    • 1. a poison of plant or animal origin, especially one produced by or derived from microorganisms and acting as an antigen in the body.

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  2. dictionary.cambridge.org › dictionary › englishTOXIN | English meaning - Cambridge Dictionary

    A toxin is a poisonous substance, especially one produced by bacteria, that causes disease. Learn more about the meaning, usage, and examples of toxin from Cambridge Dictionary.

  3. www.merriam-webster.com › dictionary › toxinToxin Definition & Meaning - Merriam-Webster

    A toxin is a poisonous substance that is a specific product of the metabolic activities of a living organism. Learn more about the synonyms, examples, history, and phrases of toxin from Merriam-Webster.

  4. biologydictionary.net › toxinToxin - Definition, Effects and Types | Biology Dictionary

    Apr 1, 2018 · A toxin is a chemical substance which damages an organism. Learn about the different types of toxins, how they affect cells and organisms, and the study of toxicology.

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  6. en.wikipedia.org › wiki › ToxinToxin - Wikipedia

    A toxin is a naturally occurring poison produced by living cells or organisms. Learn about the terminology, classification, functions, and examples of toxins, as well as their impact on human and environmental health.

  7. www.britannica.com › science › toxinToxin | Description, Types, & Sources | Britannica

    A toxin is a poisonous substance produced by living organisms or other sources. Learn about the different types of toxins, such as biotoxins, mycotoxins, phytotoxins, and zootoxins, and how they affect humans and animals.

    • The Editors of Encyclopaedia Britannica

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  9. www.dictionary.com › browse › toxinTOXIN Definition & Meaning | Dictionary.com

    A toxin is a poison produced by an organism, such as a bacterium, a plant, or an animal. Learn about the types, effects, and examples of toxins, and how they differ from antitoxins.

  10. dictionary.cambridge.org › us › dictionaryTOXIN | definition in the Cambridge English Dictionary

    A toxin is a poisonous substance, especially one produced by bacteria, that causes disease. Learn more about the meaning, usage and examples of toxin, and how to use it with other words in biology and literature.