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 team also collected samples of the microorganisms that live in different sections of the sample, with the goal of studying the chemical reactions that produce hydrogen and other molecules that life would need to thrive down there.
—
Michael Irving, New Atlas, 9 Aug. 2024
This may be because the cheese helps create a better makeup of microorganisms in the mouth.
—Merve Ceylan, Health, 24 July 2024
That said, a pH change can also throw off your vaginal flora—a dynamic and delicate collection of microorganisms that keep you healthy—during your period, which can sometimes set the stage for an infection to take hold (more on this below).
—Korin Miller, SELF, 23 July 2024
Antibacterial options, for example, can kill too much bacteria in the body’s microbiome, which is a community of thousands of microorganisms.
—Angela Haupt, TIME, 17 July 2024
See all Example Sentences for microorganism 
Michael Irving, New Atlas, 9 Aug. 2024
This may be because the cheese helps create a better makeup of microorganisms in the mouth.
—Merve Ceylan, Health, 24 July 2024
That said, a pH change can also throw off your vaginal flora—a dynamic and delicate collection of microorganisms that keep you healthy—during your period, which can sometimes set the stage for an infection to take hold (more on this below).
—Korin Miller, SELF, 23 July 2024
Antibacterial options, for example, can kill too much bacteria in the body’s microbiome, which is a community of thousands of microorganisms.
—Angela Haupt, TIME, 17 July 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 20 Aug. 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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