unicellular
adjective
uni·cel·lu·lar
ˌyü-ni-ˈsel-yə-lər 
: having or consisting of a single cell
unicellular microorganisms
Examples of unicellular in a Sentence
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The researchers found that cnidarians, ctenophores and placozoans (simple, flat animals with just a few cell types) possess a more complex genome architecture than the unicellular animals do, including chromatin loops that bring promoters and enhancers together.
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Quanta Magazine, 8 Oct. 2025
Galdieria extract blue is a specific shade made from the unicellular red algae Galdieria sulphuraria, which, realistically, makes Blue 2 sound appetizing.
—Neal Rubin, Freep.com, 9 Aug. 2025
From a technical point of view, brewer’s yeast is a collection of microscopic, nonpathogenic unicellular fungi known by the scientific name saccharomyces cerevisiae, which can be used in an active or inactive form.
—Beatrice Zocchi, Vogue, 16 Apr. 2025
This would mean that the transition from unicellular to multicellular life was not a leap requiring entirely new genes but rather an evolutionary refinement of existing genetic mechanisms.
—Scott Travers, Forbes, 11 Dec. 2024
See All Example Sentences for unicellular
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Quanta Magazine, 8 Oct. 2025
Galdieria extract blue is a specific shade made from the unicellular red algae Galdieria sulphuraria, which, realistically, makes Blue 2 sound appetizing.
—Neal Rubin, Freep.com, 9 Aug. 2025
From a technical point of view, brewer’s yeast is a collection of microscopic, nonpathogenic unicellular fungi known by the scientific name saccharomyces cerevisiae, which can be used in an active or inactive form.
—Beatrice Zocchi, Vogue, 16 Apr. 2025
This would mean that the transition from unicellular to multicellular life was not a leap requiring entirely new genes but rather an evolutionary refinement of existing genetic mechanisms.
—Scott Travers, Forbes, 11 Dec. 2024
See All Example Sentences for unicellular
Cite this Entry
“Unicellular.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unicellular. Accessed 31 Oct. 2025.
Copy CitationKids Definition
unicellular
adjective
uni·cel·lu·lar
ˌyü-ni-ˈsel-yə-lər
: having or consisting of a single cell
unicellular microorganisms
Medical Definition
unicellular
adjective
uni·cel·lu·lar
ˌyü-ni-ˈsel-yə-lər
: having or consisting of a single cell
unicellular microorganisms
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