polyphenol

noun

poly·​phe·​nol ˌpä-lē-ˈfē-ˌnōl 

-fi-ˈnōl

: a polyhydroxy phenol

especially : an antioxidant phytochemical

polyphenolic

ˌpä-lē-fi-ˈnō-lik  -ˈnä- 

adjective

Examples of polyphenol in a Sentence

Recent Examples on the Web

Grapes Grapes are rich in polyphenols, plant compounds that benefit cholesterol and heart health. —Brittany Lubeck, Verywell Health, 16 Dec. 2025

Compared to prebiotic sodas, which often contain a specific prebiotic known as inulin but not much else, whole foods offer a much broader array of beneficial nutrients—including polyphenols. —Caroline Tien, SELF, 12 Dec. 2025

Berries are extremely rich in polyphenols and have exceptional antioxidant and anti-inflammatory properties which benefit skin, blood vessels, and brain health. —Vogue, 12 Dec. 2025

Even though their nutrient profiles differ, both juices are rich in compounds like nitrates, betalains, and polyphenol antioxidants that may help support healthy blood pressure. —Jillian Kubala, Health, 9 Dec. 2025

Word History

Etymology

International Scientific Vocabulary

First Known Use

1894, in the meaning defined above

Medical Definition

polyphenol

noun

poly·​phe·​nol ˌpäl-i-ˈfē-ˌnōl, -ˌnȯl, -fi-ˈ 

: a polyhydroxy phenol

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

polyphenolic

-fi-ˈnō-lik  -ˈnäl-ik 

adjective