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

Phytochemistry Butterfly pea contains several flavonol (polyphenol) compounds, notable among which are kaempferol, quercetin, myricetin, and their derivatives. — Encyclopedia Britannica, 9 Oct. 2026

To combat those spots, this rich pudding-like cream features the brand’s signature viniferine, a polyphenol-rich antioxidant. — Sheryl George, Allure, 5 Oct. 2026

Plums contain polyphenols such as anthocyanins and chlorogenic acids, plant compounds that may help reduce oxidative stress and support healthy blood vessels. — Kathleen Ferraro, Verywell Health, 4 Oct. 2026

The polyphenols and omega-3 fats in basil seeds may also help reduce inflammation. — Lindsey Desoto, HEALTH, 23 Sep. 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

1894, in the meaning defined above

Rhymes for polyphenol

• nitrophenol
• allopurinol
• dinitrophenol
• eugenol
• pentachlorophenol
• phenol

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