unicellular

adjective

uni·​cel·​lu·​lar ˌyü-ni-ˈsel-yə-lər How to pronounce unicellular (audio)
: having or consisting of a single cell
unicellular microorganisms

Examples of unicellular in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
To uncover this, a new analytical method was designed to compare gene expression profiles across diverse animal lineages and unicellular organisms. — Mrigakshi Dixit, Interesting Engineering, 25 May 2026 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 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 Secondary endosymbiosis, on the other hand, refers to the internalization of a unicellular organism that already possesses organelles formed through primary endosymbiosis. — Encyclopedia Britannica, 18 June 2026 See All Example Sentences for unicellular

Word History

First Known Use

1858, in the meaning defined above

Time Traveler
The first known use of unicellular was in 1858

Rhymes for unicellular

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Browse Nearby Words

unicell
unicellular
unicellular animal
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Cite this Entry

“Unicellular.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unicellular. Accessed 7 Jul. 2026.

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Kids Definition

unicellular

adjective
uni·​cel·​lu·​lar ˌyü-ni-ˈsel-yə-lər How to pronounce unicellular (audio)
: having or consisting of a single cell
unicellular microorganisms

Medical Definition

unicellular

adjective
uni·​cel·​lu·​lar ˌyü-ni-ˈsel-yə-lər How to pronounce unicellular (audio)
: having or consisting of a single cell
unicellular microorganisms
unicellularity
-ˌsel-yə-ˈlar-ət-ē How to pronounce unicellular (audio)
noun
plural unicellularities
Last Updated: - Updated example sentences
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