pro·​bi·​ot·​ic | \prō-bī-ˈä-tik, -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

Keep scrolling for more

Other Words from probiotic

probiotic adjective

Examples of probiotic in a Sentence

Recent Examples on the Web

Packed with antibacterial properties and natural probiotics, this honey is perfect for adding to tea as well as your skin-care routine. Rachel Marlowe, Vogue, "This All-Green Apothecary in New Zealand Is Worth a Trek Across the Globe," 29 May 2018 The second Science Translational Medicine study describes a vaccine that appears to function unexpectedly—and almost immediately—as a probiotic against cholera. Richard Conniff, Scientific American, "New Probiotic Cholera Vaccine Can Outrace the Infection’s Rapid Spread," 13 June 2018 Since the way to a diner's heart is quite literally through his or her stomach, chefs are increasingly padding their menus with natural probiotics and anti-inflammatories. Esquire Editors, Esquire, "How to Be Happy with What You Eat This Year," 30 Jan. 2018 This week, for instance, Prime members can get the discount on raspberries, crackers, and probiotics, among other products. Don Reisinger, Fortune, "Amazon Is Expanding Whole Foods Perks to More Areas. Here's Where," 30 May 2018 The benefits of goat milk for dogs are touted to range from helping with tummy issues (pups need probiotics too), relieving allergies (by fighting yeast), and curbing arthritis and joint pain (the milk is said to reduce inflammation). Sunset, "10 Best Healthy Pet Treats," 22 Jan. 2018 New lines have interesting mixes of fruit and nuts, and some producers are experimenting with millennial-friendly additions like probiotics and chia seeds. Kim Severson, New York Times, "Is America Ready to Love Cottage Cheese Again?," 26 June 2018 Dear sister, Spirits were low in the medic tent as supplies of probiotics and arnica dwindle. Don Sweeney, sacbee, "Letters from the 'front' on Twitter mock prediction of second Civil War on July 4," 3 July 2018 To make their sensor, engineers and biologists turned to a bacterium commonly sold as a probiotic in Europe. Elizabeth Pennisi, Science | AAAS, "Bacteria in a pill may one day track your body’s chemistry," 24 May 2018

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.

See More

First Known Use of probiotic

1974, in the meaning defined above

History and Etymology for probiotic

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

Keep scrolling for more

Learn More about probiotic

Dictionary Entries near probiotic








Statistics for probiotic

Look-up Popularity

Time Traveler for probiotic

The first known use of probiotic was in 1974

See more words from the same year

Keep scrolling for more

More Definitions for probiotic


pro·​bi·​ot·​ic | \prō-bī-ˈät-ik, -bē- \

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).


a soft lustrous wool fabric with mohair

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
True or False

Test your knowledge - and maybe learn something along the way.


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!