Microorganism Definition

mīkrō-ôrgə-nĭzəm
microorganisms
noun
microorganisms
Any microscopic or ultramicroscopic animal, plant, bacterium, virus, etc.
Webster's New World

Other Word Forms of Microorganism

Noun

Singular:
microorganism
Plural:
microorganisms, microrganisms

Origin of Microorganism

  • From micro- +"Ž organism.

    From Wiktionary

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microorganism