polyphenol
noun
poly·phe·nol
ˌpä-lē-ˈfē-ˌnōl 
-fi-ˈnōl
: a polyhydroxy phenol
especially
: an antioxidant phytochemical
Examples of polyphenol in a Sentence
Recent Examples on the Web
Apples Apples are a widely available source of polyphenols, especially when eaten with the skin on.
—
Lindsey Desoto, Health, 27 Jan. 2026
Beet Juice Beetroot contains a combination of dietary nitrate, betalains, and polyphenols that may support brain health.
—Sarah Jividen, Verywell Health, 21 Jan. 2026
According to Manaker, walnuts help bump up the protein content of any breakfast dish (while also providing an excellent source of omega-3 ALA, fiber, and polyphenols).
—Riley Wofford, Martha Stewart, 17 Jan. 2026
The study focuses on how bananas, which are high in polyphenol oxidase, can decrease the absorption of flavan-3-ols, which are a type of flavonoids that boast many health benefits.
—Heather Riske, Better Homes & Gardens, 13 Jan. 2026
See All Example Sentences for polyphenol
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Lindsey Desoto, Health, 27 Jan. 2026
Beet Juice Beetroot contains a combination of dietary nitrate, betalains, and polyphenols that may support brain health.
—Sarah Jividen, Verywell Health, 21 Jan. 2026
According to Manaker, walnuts help bump up the protein content of any breakfast dish (while also providing an excellent source of omega-3 ALA, fiber, and polyphenols).
—Riley Wofford, Martha Stewart, 17 Jan. 2026
The study focuses on how bananas, which are high in polyphenol oxidase, can decrease the absorption of flavan-3-ols, which are a type of flavonoids that boast many health benefits.
—Heather Riske, Better Homes & Gardens, 13 Jan. 2026
See All Example Sentences for polyphenol
Cite this Entry
“Polyphenol.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polyphenol. Accessed 1 Feb. 2026.
Copy CitationMedical 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
Love words? Need even more definitions?
Merriam-Webster unabridged
