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
Rich in polyphenols—plant compounds that help your cells respond better to insulin, the hormone that moves sugar from your blood into cells.
—
Lindsay Curtis, Verywell Health, 24 Oct. 2025
Overall, Stefanski notes that coffee is a rich source of polyphenols, which are a group of plant compounds with anti-inflammatory and antioxidant properties.
—Laura Schober, Health, 23 Oct. 2025
Other delicious detoxers are the anthocyanidins in berries, grapes and beets, polyphenols in green tea and resveratrol in red wine.
—Sheah Rarback, Miami Herald, 14 Oct. 2025
Not all commercial green tea products meet the same quality standards that were used in the laboratory-grade extract, and dosage, bioavailability and polyphenol content can vary widely between preparations.
—New Atlas, 8 Oct. 2025
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.
Lindsay Curtis, Verywell Health, 24 Oct. 2025
Overall, Stefanski notes that coffee is a rich source of polyphenols, which are a group of plant compounds with anti-inflammatory and antioxidant properties.
—Laura Schober, Health, 23 Oct. 2025
Other delicious detoxers are the anthocyanidins in berries, grapes and beets, polyphenols in green tea and resveratrol in red wine.
—Sheah Rarback, Miami Herald, 14 Oct. 2025
Not all commercial green tea products meet the same quality standards that were used in the laboratory-grade extract, and dosage, bioavailability and polyphenol content can vary widely between preparations.
—New Atlas, 8 Oct. 2025
See All Example Sentences for polyphenol
Cite this Entry
“Polyphenol.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polyphenol. Accessed 4 Nov. 2025.
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
Share