microorganism

noun
mi·​cro·​or·​gan·​ism | \ ˌmī-krō-ˈȯr-gə-ˌni-zəm How to pronounce microorganism (audio) \

Definition of microorganism

: an organism (such as a bacterium or protozoan) of microscopic or ultramicroscopic size

Examples of microorganism in a Sentence

Recent Examples on the Web

Ultimately, the researchers hope to produce populations of microorganisms that might mimic any that exist in Titan’s subsurface waters. Shannon Stirone, Scientific American, "New NASA Mission Will Fly Titan’s Frigid Skies to Search for Life’s Beginnings," 27 June 2019 To put it simply, probiotics are live microorganisms, such as strains of bacteria, that in adequate amounts, give you a health benefit. Beth Janes, Good Housekeeping, "Everything You Need to Know About Probiotics, According to Experts," 11 May 2019 Inulin is a type of prebiotic, a substance that’s used by the microorganisms in your digestive tract and positively influences health. Christy Brissette, Washington Post, "What is inulin, and why is it showing up in so many food products?," 12 June 2019 The real answer, the data shows, might relate to the microbiome (the microorganisms in the gut). Nicole Blackwood, chicagotribune.com, "Slow down the calorie counting: Personalized diets could be the future of healthy eating, study suggests," 12 June 2019 Quo’s fabric is designed to fight microorganisms that cause infections; cotton has many benefits, but that isn’t one of them. Emily Farra, Vogue, "Quo’s Active Underwear Is So Genius, You’ll Wonder How You Lived Without It," 24 Aug. 2018 This just so happens to be the kind of environment in which microorganisms like bacteria and fungus typically thrive. Korin Miller, SELF, "7 Dangerous Mistakes You’re Making With Your Contact Lens Case," 25 July 2018 The limbs may have had tight angles to the trunk which can be weak points letting in the microorganisms. oregonlive.com, "Tips for success when planting under conifer and maple trees? Ask an expert," 8 June 2019 In general, bar soap cleans by physically washing away dirt and microorganisms, according to the Centers for Disease Control and Prevention (CDC). Cassie Shortsleeve, SELF, "Is Bar Soap Sanitary or Just Crawling With Germs?," 5 Apr. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'microorganism.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of microorganism

1880, in the meaning defined above

History and Etymology for microorganism

International Scientific Vocabulary

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Statistics for microorganism

Last Updated

13 Jul 2019

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Time Traveler for microorganism

The first known use of microorganism was in 1880

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More Definitions for microorganism

microorganism

noun

English Language Learners Definition of microorganism

biology : an extremely small living thing that can only be seen with a microscope

microorganism

noun
mi·​cro·​or·​gan·​ism | \ ˌmī-krō-ˈȯr-gə-ˌni-zəm How to pronounce microorganism (audio) \

Kids Definition of microorganism

: a living thing (as a bacterium) that can only be seen with a microscope

microorganism

noun
mi·​cro·​or·​gan·​ism | \ -ˈȯr-gə-ˌniz-əm How to pronounce microorganism (audio) \

Medical Definition of microorganism

: an organism of microscopic or ultramicroscopic size

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More from Merriam-Webster on microorganism

Spanish Central: Translation of microorganism

Nglish: Translation of microorganism for Spanish Speakers

Britannica.com: Encyclopedia article about microorganism

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