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

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

The next step could be to give human subjects two red wines that are low and high in quercetin and ask whether either wine causes a headache.

From Salon • Dec. 16, 2024

We spied a paper showing that quercetin is a good inhibitor of ALDH.

From Salon • Dec. 16, 2024

So-called Flavine is a commercial preparation of Quercitron Bark consisting of quercitrin or of quercetin; it is much used by wool-dyers for the production of bright yellow and orange colours.

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