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’s because of its high content of catechins, which are polyphenol antioxidants. — Angelica Bottaro, Verywell Health, 22 July 2026

Oral sunscreens generally contain a blend of vitamins, minerals, carotenoids (pigments), and polyphenols (plant compounds). — Kristen Fischer, Health, 22 July 2026

Fruit juice also holds on to phytochemicals from the original fruit, including flavonoids, polyphenols, anthocyanins (especially in grape and cherry juice) and carotenoids (especially in orange juice). — Lauren Jarvis-Gibson july 21, Charlotte Observer, 21 July 2026

Juice also retains many of the phytochemicals found in whole fruit, including flavonoids, polyphenols, anthocyanins (especially in grape and cherry juice) and carotenoids (especially in orange juice). — Lauren Jarvis-Gibson july 21, Sacbee.com, 21 July 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