quercetin

American  

[kwur-si-tin] / ˈkwɜr sɪ tɪn /

noun

Chemistry.

1. a yellow, crystalline, slightly water-soluble powder, C 1 5 H 1 0 O 7 , obtained from the bark of the quercitron and other vegetable substances, used as a yellow dye; flavin.

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quercetin British  

/ ˈkwɜːsɪtɪn, kwɜːˈsɛtɪk, -ˈsiː- /

noun

1. Also called: flavin.  a yellow crystalline pigment found naturally in the rind and bark of many plants. It is used in medicine to treat fragile capillaries. Formula: C 15 H 10 O 7 ; melting pt: 316–7°C

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Other Word Forms

• quercetic
  adjective

Etymology

Origin of quercetin

1855–60; < New Latin quercēt ( um ) an oak grove ( Latin querc ( us ) oak ( see quercine) + -ētum suffix of places where a given plant grows) + -in ²

Example Sentences

See Examples For:

quercetin

Levels of several other flavonoids increased, including quercetin.

From Science Daily ● Jun. 15, 2026

Early senolytic drugs such as dasatinib, quercetin, and fisetin were developed to destroy senescent cells by disrupting the survival pathways that keep them alive.

From Science Daily ● May 22, 2026

Plant-based supplements containing quercetin, curcumin, and piperine improved fatigue compared with placebo.

From Science Daily ● Jan. 8, 2026

So, if quercetin causes headaches, are there red wines without it?

From Salon ● Dec. 16, 2024

The colouring principle of Quercitron Bark is called quercitrin, which by the action of boiling mineral acid solutions is decomposed, with the production of the true colouring matter termed quercetin.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" by Various