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

According to Pumper, pumpkin seeds are also rich in compounds such as antioxidants, amino acids, lignans, and polyphenols, all of which work together to help regulate blood pressure. — Eleesha Lockett, Verywell Health, 17 July 2026

The Mediterranean diet is naturally rich in anti-inflammatory nutrients, including omega-3 fatty acids from fish and antioxidants called polyphenols found in extra-virgin olive oil. — Khloe Quill, FOXNews.com, 15 July 2026

Formulated around one of the most nourishing oils in the world, olive oil, which is high in antioxidants, vitamin E and polyphenols. — ABC News, 14 July 2026

Specifically, walnuts contain antioxidants called polyphenols, including ellagitannins and ellagic acid, says Roach. — Kirsten Nunez, Martha Stewart, 4 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