pro·​bi·​ot·​ic | \ prō-bī-ˈä-tik How to pronounce probiotic (audio) , -bē-ˈä-\

Definition of probiotic

: a microorganism (such as lactobacillus) that when consumed (as in a food or a dietary supplement) maintains or restores beneficial bacteria to the digestive tract also : a product or preparation that contains such microorganisms — compare prebiotic

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Other Words from probiotic

probiotic adjective

Examples of probiotic in a Sentence

Recent Examples on the Web

The company makes four workout supplements, promising better results through its high-quality ingredients and scientifically backed blends of superfoods, probiotics, and protein powders. Sara Harrison, WIRED, "The Wild, Unregulated World of Sports Supplements," 22 July 2019 Both are ancient, fermented, lightly fizzy beverages that can be rich sources of probiotics and are popular with home-brewers. Ellie Krieger, The Seattle Times, "Move over, quinoa. Kvass and celtuce are the hot new health foods," 12 Apr. 2019 And there was snack food — lots and lots of snack food, each purporting to have more amino acids or fiber or probiotics than the last. Liza Zwirn,, "At the Fancy Food Show, vegan and vegetarian foods dominate," 5 Aug. 2019 Through a free, hour-long course called Seed University, influencers are schooled on the science of microbiomes and probiotics, as well as the FTC’s guidelines on responsible product endorsement. Anne Quito, Quartzy, "A new “university” for Instagram influencers aims to stop the spread of misinformation," 23 July 2019 Living microorganisms with health benefits are known as probiotics, but Cani found that Akkermansia muciniphila was most effective when pasteurized, or killed through heat. Arman Azad, CNN, "This bacteria may help people with obesity live healthier lives, study says," 3 July 2019 Taking a probiotic may also be helpful, according to the Mayo Clinic. Haley Swanson, Glamour, "What Is Bacterial Vaginosis? And Why Do I Keep Getting It?," 27 May 2019 In many ways, the study is pretty typical of those on probiotics. Beth Mole, Ars Technica, "New York Times falls for “obesity probiotic” hype," 5 July 2019 According to Intralytix, the phages have applications in environmental sanitation and as probiotics — killing the bad stuff, keeping the good stuff. B David Zarley, The Verge, "These superbug-fighting viruses are making a comeback," 5 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'probiotic.' 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 probiotic

1974, in the meaning defined above

History and Etymology for probiotic

pro- entry 2 + -biotic (as in antibiotic)

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Statistics for probiotic

Last Updated

27 Aug 2019

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Time Traveler for probiotic

The first known use of probiotic was in 1974

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More Definitions for probiotic


pro·​bi·​ot·​ic | \ prō-bī-ˈät-ik, -bē- How to pronounce probiotic (audio) \

Medical Definition of probiotic

: a microorganism (such as lactobacillus or bifidobacterium) that when consumed (as in a food or a dietary supplement) maintains or restores beneficial bacteria to the digestive tract also : a product or preparation that contains such microorganisms — compare prebiotic

Other Words from probiotic

probiotic adjective

More from Merriam-Webster on probiotic

Nglish: Translation of probiotic for Spanish Speakers

Comments on probiotic

What made you want to look up probiotic? Please tell us where you read or heard it (including the quote, if possible).


miscellaneous remnants or debris

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