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

That eating pattern delivers omega-3s, polyphenols, B vitamins and antioxidants from whole food sources alongside fiber and synergistic compounds that isolated pills can’t replicate. —Allison Palmer, Sacbee.com, 7 May 2026

The Mediterranean pattern delivers omega-3s, polyphenols, B vitamins and antioxidants from whole food sources alongside fiber and synergistic compounds that isolated supplements don’t replicate. —Allison Palmer, Charlotte Observer, 7 May 2026

Beverages rich in antioxidants and polyphenols may calm inflammatory pathways and support recovery. —Stephanie Anderson Witmer, Health, 6 May 2026

Taking its name from a wine term, Caudalie launched with three polyphenol-rich products in 1993. —Condé Nast, Condé Nast Traveler, 6 May 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