micro-organism

A form of microorganism — An organism that is too small to be seen by the unaided eye; especially, a single-celled organism, such as a bacterium.

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microorganism
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Meanings

nounmicro-organism (plural micro-organisms)

plural micro-organisms

  1. alternativeAlternative spelling of microorganism.

Synonyms & antonyms

nounany organism of microscopic size

Similar
microorganism
Broader
organismbeing
Also see
microorganism

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry
APA

micro-organism. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/micro-organism

MLA

“micro-organism.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/micro-organism. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “micro-organism,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/micro-organism.

Source: micro-organism on Wiktionary, CC BY-SA 4.0.