poly·​phe·​nol | \ ˌpä-lē-ˈfē-ˌnōl How to pronounce polyphenol (audio) , -fi-ˈnōl\

Definition of polyphenol

: a polyhydroxy phenol especially : an antioxidant phytochemical

Keep scrolling for more

Other Words from polyphenol

polyphenolic \ ˌpä-​lē-​fi-​ˈnō-​lik How to pronounce polyphenolic (audio) , -​ˈnä-​ How to pronounce polyphenolic (audio) \ adjective

Examples of polyphenol in a Sentence

Recent Examples on the Web

Its main compounds are polyphenols, known as limonoids, and naringenin, which help when killing bacteria in laundry, cleaning carpet spills (that could lead to mold growth!), and for disinfecting and sterilizing spaces. Cate Geiger, Country Living, "How to Get Rid of Black Mold Naturally," 23 May 2019 Also, florets provide two to three times more healthful glucosinolates and about twice as many polyphenols compared to the stems. Jaclyn London, Ms, Rd, Cdn, Good Housekeeping, "Why You Should Eat Broccoli Every Single Day," 21 Mar. 2018 In particular, these strains contain super high levels of EGCG polyphenol—a powerful antioxidant found only in green tea and known for reducing the appearance of lines and wrinkles and increasing skin radiance. Vogue, "South Korea’s Jeju Island Has the Best Beaches, Freshest Seafood, and the Makings for the Best Beauty Products Ever—Green Tea," 18 Sep. 2018 The main active component of green tea, this anti-inflammatory polyphenol has been shown to reduce sun damage and slow signs of aging by neutralizing free radicals. Allure, "The Skin-Care Glossary: A Comprehensive Guide to Everything You Need to Know," 17 Aug. 2018 Whittel also recommends taking glow-boosting polyphenol supplements (such as berberine and curcumin). Gretchen Röehrs, Harper's BAZAAR, "The Reverse-Aging Diet (Yes, You Can Have Carbs)," 9 Mar. 2018 The polyphenol in mangos might be protective against certain types of cancer. Sheah Rarback, miamiherald, "Ubiquitous mangos taste good - and are good for you, too," 29 June 2018 Vinson’s research has shown that a serving of popcorn contains roughly double the amount of polyphenols as a serving of fruit (although fruit may have different or more numerous amounts of other vitamins and healthy phytochemicals). Markham Heid, Time, "You Asked: What’s the Healthiest Way to Make Popcorn?," 28 Mar. 2018 Research shows that grapes of all colors – red, green and black—are a natural source of beneficial components called polyphenols that contribute to a healthy heart and may also play a role in promoting brain health and healthy aging. Patricia Bannan, Fox News, "10 desserts you won't believe are actually healthy," 8 Mar. 2018

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

1894, in the meaning defined above

History and Etymology for polyphenol

International Scientific Vocabulary

Keep scrolling for more

Learn More about polyphenol

Statistics for polyphenol

Last Updated

8 Jun 2019

Look-up Popularity

Time Traveler for polyphenol

The first known use of polyphenol was in 1894

See more words from the same year

Keep scrolling for more

More Definitions for polyphenol


poly·​phe·​nol | \ ˌpäl-i-ˈfē-ˌnōl, -ˌnȯl, -fi-ˈ How to pronounce polyphenol (audio) \

Medical Definition of polyphenol

: a polyhydroxy phenol especially : an antioxidant phytochemical (as chlorogenic acid) that tends to prevent or neutralize the damaging effects of free radicals

Other Words from polyphenol

polyphenolic \ -​fi-​ˈnō-​lik How to pronounce polyphenolic (audio) , -​ˈnäl-​ik How to pronounce polyphenolic (audio) \ adjective

Comments on polyphenol

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


showing courage and determination

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

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!