• Any microscopic form of life; -- particularly
    applied to bacteria and similar organisms, esp. such are supposed to
    cause infectious diseases.


    Microorganism meaning & definition 1 of Microorganism.


  • a living thing that on its own is too small to be seen without a microscope

    Microorganism meaning & definition 2 of Microorganism.


  • A microscopic organism, especially a bacterium, virus, or fungus.

    Microorganism meaning & definition 3 of Microorganism.

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