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
Pneumonia can be caused by various bacteria, viruses, and other microorganisms.
—
Ann Pietrangelo, Verywell Health, 21 Jan. 2025
But with bokashi composting, organic matter is placed in an airtight composter or bucket, covered with a natural bran inoculated with beneficial microorganisms, and fermented for 2 weeks.
—Lauren Landers, Better Homes & Gardens, 19 Jan. 2025
Still, the prospect of using microorganisms to pump out new-to-nature proteins on demand is thrilling to scientists.
—Lauren Leffer, Popular Science, 15 Jan. 2025
Skin Barrier Damage One of the skin's primary duties is to keep out harmful microorganisms like bacteria, viruses, and fungi.
—Cristina Mutchler, Health, 9 Jan. 2025
See all Example Sentences for microorganism 
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Ann Pietrangelo, Verywell Health, 21 Jan. 2025
But with bokashi composting, organic matter is placed in an airtight composter or bucket, covered with a natural bran inoculated with beneficial microorganisms, and fermented for 2 weeks.
—Lauren Landers, Better Homes & Gardens, 19 Jan. 2025
Still, the prospect of using microorganisms to pump out new-to-nature proteins on demand is thrilling to scientists.
—Lauren Leffer, Popular Science, 15 Jan. 2025
Skin Barrier Damage One of the skin's primary duties is to keep out harmful microorganisms like bacteria, viruses, and fungi.
—Cristina Mutchler, Health, 9 Jan. 2025
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 30 Jan. 2025.
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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