quercetin

noun

quer·​ce·​tin ˈkwər-sə-tən 

: a yellow crystalline pigment C₁₅H₁₀O₇ occurring usually in the form of glycosides in various plants

Examples of quercetin in a Sentence

Recent Examples on the Web

Chia Seeds Chia seeds are rich in soluble fiber and quercetin, an antioxidant that may support heart health by reducing inflammation. —Abby Norman, Verywell Health, 9 June 2025

Other potential culprits In addition to quercetin and overindulgence of alcoholic beverages, experts noted other possible culprits for red wine headaches. —Amy McGorry, FOXNews.com, 9 May 2025

Onions Onions contain quercetin, an antioxidant that acts like an antihistamine in the body.6 Antihistamines block histamine, a chemical released during an allergic reaction. —Julie Marks, Verywell Health, 19 May 2025

One theory suggests that a flavanol called quercetin, found in higher concentrations in red wines compared to white, may be responsible. —Amy McGorry, FOXNews.com, 9 May 2025

Word History

Etymology

International Scientific Vocabulary, from Latin quercetum oak forest, from quercus oak — more at fir

First Known Use

1856, in the meaning defined above

Medical Definition

quercetin

noun

quer·​ce·​tin ˈkwər-sət-ən 

: a yellow crystalline pigment C₁₅H₁₀O₇ occurring usually in the form of glycosides in various plants