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

Carrots are rich in polyphenols and phenolic acids, including chlorogenic acid. —Barbie Cervoni, Verywell Health, 7 Nov. 2025

Coffee and tea provide a variety of antioxidants called polyphenols, Scott Keatley, RD, co-owner of Keatley Medical Nutrition Therapy, tells SELF. —Korin Miller, SELF, 7 Nov. 2025

Pomegranate seeds, also known as arils, arils, are packed with polyphenols and flavonoids, including anthocyanins, ellagitannins and organic acids that have powerful antioxidant and anti-inflammatory activity. —Jillian Kubala, Health, 6 Nov. 2025

Apples Apples are high in vitamin C, fiber, potassium, and polyphenols. —Michiko Tomioka, CNBC, 1 Nov. 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