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 ( quercine ) + -ētum suffix of places where a given plant grows) + -in ²

Example Sentences

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

From Science Daily • Jan. 8, 2026

These tests confirmed that quercetin was a good inhibitor.

From Salon • Dec. 16, 2024

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

From Salon • Dec. 16, 2024

Then, we added the suspected inhibitors – quercetin, as well as some other phenolics we wanted to test – to see whether they slowed the process.

From Salon • Dec. 16, 2024

Quercitrin, C21H22O12, is a yellow dyestuff found in Quercus tinctoria; it hydrolyses to rhamnose and quercetin, a dioxy-β-phenyl-trioxybenzo-γ-pyrone.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" by Various