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

Citrus Bergamot Citrus bergamot is a fruit native to Southern Italy, rich in polyphenols and flavonoids. —Sarah Jividen, Verywell Health, 10 Mar. 2026

Pomegranates are rich in polyphenols that support blood vessel health. —Lynn Andriani, Martha Stewart, 9 Mar. 2026

Pomegranate juice is better for supporting heart health and blood pressure due to its high potassium and polyphenol content. —Jillian Kubala, Health, 9 Mar. 2026

Lentils also contain bioactive compounds such as polyphenols with antioxidant and anti-inflammatory properties, which may help combat oxidative stress - a process linked to aging and chronic diseases including certain cancers. —Daryl Austin, USA Today, 8 Mar. 2026

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