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

Early Harvest Extra Virgin Olive Oil is harvested early in the season at peak polyphenol levels, for a bold, grassy character with notes of green tomato, artichoke, and a signature peppery finish. — ABC News, 17 Oct. 2026

These include polyphenols, plant compounds with antioxidant and anti-inflammatory properties. — Lindsey Desoto, HEALTH, 13 Oct. 2026

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

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