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Microorganism
//ˌmaɪ.kɹəʊˈɔː.ɡəˌnɪz.m̩// noun
Definitions
Noun
- 1 An organism that is too small to be seen by the unaided eye; especially, a single-celled organism, such as a bacterium.
"The cud is then reswallowed and further digested by specialized microorganisms that live in the rumen."
- 2 any organism of microscopic size wordnet
Etymology
From micro- + organism.
See also for "microorganism"
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