microorganism
noun
mi·cro·or·gan·ism
ˌmī-krō-ˈȯr-gə-ˌni-zəm 
: an organism (such as a bacterium or protozoan) of microscopic or ultramicroscopic size
Examples of microorganism in a Sentence
Recent Examples on the Web
The community of beneficial microorganisms that dwell among the roots of plants are the botanical equivalent of a gut microbiome.
—
Shi En Kim, Smithsonian Magazine, 30 Oct. 2024
The plant in Kalundborg, Denmark lacked information intended to show that water used in drug production was adequately controlled for certain microorganisms, according to a US Food and Drug Administration inspection report from March.
—Madison Muller, Fortune, 29 Oct. 2024
Sugar and other ingredients in Halloween treats can cast a sickly spell on the trillions of microorganisms that reside in your gut, collectively known as the gut microbiome.
—Christopher Damman, Discover Magazine, 23 Oct. 2024
Racial disparities in diagnosis Recent research has been exploring the gut microbiome—the ecosystem of microorganisms in the intestines—and how imbalances or dysfunction in this environment may contribute to the development of breast cancer.
—Sandra Rose Salathe, Flow Space, 23 Oct. 2024
See all Example Sentences for microorganism 
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Shi En Kim, Smithsonian Magazine, 30 Oct. 2024
The plant in Kalundborg, Denmark lacked information intended to show that water used in drug production was adequately controlled for certain microorganisms, according to a US Food and Drug Administration inspection report from March.
—Madison Muller, Fortune, 29 Oct. 2024
Sugar and other ingredients in Halloween treats can cast a sickly spell on the trillions of microorganisms that reside in your gut, collectively known as the gut microbiome.
—Christopher Damman, Discover Magazine, 23 Oct. 2024
Racial disparities in diagnosis Recent research has been exploring the gut microbiome—the ecosystem of microorganisms in the intestines—and how imbalances or dysfunction in this environment may contribute to the development of breast cancer.
—Sandra Rose Salathe, Flow Space, 23 Oct. 2024
See all Example Sentences for microorganism
Dictionary Entries Near microorganism
Cite this Entry
“Microorganism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microorganism. Accessed 19 Nov. 2024.
Copy CitationKids Definition
microorganism
noun
mi·cro·or·gan·ism
ˌmī-krō-ˈȯr-gə-ˌniz-əm
: an organism (as a bacterium) of microscopic or less than microscopic size
Medical Definition
microorganism
noun
mi·cro·or·gan·ism
-ˈȯr-gə-ˌniz-əm
: an organism of microscopic or ultramicroscopic size
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