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
Chlorine compounds are effective at destroying germs, preventing infections, and stopping the growth of many harmful microorganisms.
—
Kashif J. Piracha, Verywell Health, 31 Oct. 2024
How fast a body decays within a grave is controlled by temperature, humidity, oxygen levels, water availability, the acidity of the surrounding substrate, the chemical composition of the corpse, and the presence or lack of certain microorganisms.
—David Bressan, Forbes, 31 Oct. 2024
Researchers from the university studied samples of biofilms – the glue-like communities of microorganisms attached to a surface – from 34 toothbrushes and 92 showerheads to reach their conclusions, which were published Wednesday in the journal Frontiers in Microbiomes.
—Issy Ronald, CNN, 9 Oct. 2024
As cheese matures, enzymes and microorganisms inside of it can snip the casein molecules themselves.
—Meghan Bartels, Scientific American, 2 Oct. 2024
See all Example Sentences for microorganism 
These examples are automatically compiled from online sources to
illustrate current usage. Opinions expressed in the examples do not represent those of
Merriam-Webster or its editors.
Send us feedback
about these examples.
Kashif J. Piracha, Verywell Health, 31 Oct. 2024
How fast a body decays within a grave is controlled by temperature, humidity, oxygen levels, water availability, the acidity of the surrounding substrate, the chemical composition of the corpse, and the presence or lack of certain microorganisms.
—David Bressan, Forbes, 31 Oct. 2024
Researchers from the university studied samples of biofilms – the glue-like communities of microorganisms attached to a surface – from 34 toothbrushes and 92 showerheads to reach their conclusions, which were published Wednesday in the journal Frontiers in Microbiomes.
—Issy Ronald, CNN, 9 Oct. 2024
As cheese matures, enzymes and microorganisms inside of it can snip the casein molecules themselves.
—Meghan Bartels, Scientific American, 2 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 16 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share