flavonoid

American  

[fley-vuh-noid] / ˈfleɪ vəˌnɔɪd /

noun

Biochemistry

1. any of a group of water-soluble, principally yellow polyphenols present in plants and having a structure similar to flavone: flavonoids are noted for their antioxidant, antiviral, anticancer, anti-inflammatory, and antiallergenic properties.

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flavonoid British  

/ ˈfleɪvəˌnɔɪd /

noun

1. any of a group of organic compounds that occur as pigments in fruit and flowers

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flavonoid Scientific  

/ flā′və-noid′ /

1. Any of a large group of water-soluble plant pigments that are beneficial to health. Flavonoids are polyphenols and have antioxidant, anti-inflammatory, and antiviral properties. They also help to maintain the health of small blood vessels and connective tissue, and some are under study as possible treatments of cancer.

2. Also called bioflavonoid

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Etymology

Origin of flavonoid

First recorded in 1945–50; flavon(e) + -oid

Example Sentences

Quercetin is a plant flavonoid found in fruits, vegetables, tea, and wine that can act as a powerful antioxidant and have anti-inflammatory properties.

From Science Daily • Dec. 25, 2025

A study showed that the total flavonoid content was four times higher in "ultra-premium" wines than in lower quality ones.

From Salon • Dec. 13, 2023

One of these is quercetin, a flavonoid with antioxidant and anti-inflammatory effects.

From Seattle Times • Nov. 13, 2023

The study controlled for diet apart from flavonoid intake and for physical activity, alcohol consumption, age and body mass index, among other factors that may affect the risk for dementia.

From New York Times • Aug. 9, 2021

By 1991, he and his colleagues had identified and patented the flavonoid 3',5'-hydroxylase gene in petunias.

From Science Magazine • May 2, 2019