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
This enrichment could be a consequence of unusual atmospheric chemistry, or it could have been caused by the presence of ancient microorganisms that preferentially consumed the lighter form of carbon, just as life on Earth does.
—
Robin Wordsworth, Scientific American, 26 June 2024
Biofilm – the layer of microorganisms that build up on surfaces in contact with water – can also cause problems in pipes.
—Laodong Guo, The Conversation, 25 June 2024
The liquid darkens and the flavor intensifies as the brew matures; microorganisms, flourishing in the wood’s crevices, create a distinct flavor exclusive to the maker.
—Megan Zhang, Saveur, 9 May 2024
This reduces the total number of microorganisms in the product and also inactivates enzymes that could contribute to spoilage.
—Juan Silva, Discover Magazine, 21 June 2024
See all Example Sentences for microorganism 
Robin Wordsworth, Scientific American, 26 June 2024
Biofilm – the layer of microorganisms that build up on surfaces in contact with water – can also cause problems in pipes.
—Laodong Guo, The Conversation, 25 June 2024
The liquid darkens and the flavor intensifies as the brew matures; microorganisms, flourishing in the wood’s crevices, create a distinct flavor exclusive to the maker.
—Megan Zhang, Saveur, 9 May 2024
This reduces the total number of microorganisms in the product and also inactivates enzymes that could contribute to spoilage.
—Juan Silva, Discover Magazine, 21 June 2024
See all Example Sentences for microorganism
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'microorganism.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near microorganism
Cite this Entry
“Microorganism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microorganism. Accessed 15 Jul. 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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