flavonoid

noun fla·vo·noid \ ˈflā-və-ˌnȯid \

Definition of flavonoid

: any of a large group of typically biologically active water-soluble plant compounds (such as the anthocyanins and flavones) that include pigments ranging in color from yellow to red to blue and occur especially in fruits, vegetables, and herbs (such as grapes, citrus fruits, peppers, and dill)
  • Flavonoids are effective scavengers of free radicals in the test tube (in vitro). However, even with very high flavonoid intakes, plasma and intracellular flavonoid concentrations in humans are likely to be 100 to 1000 times lower than concentrations of other antioxidants …
  • —Jane Higdon
  • The rich palette of dyes in butterflies' wings are all derived from chemicals called flavonoids, which the insects cannot make themselves and must sequester from their food plants.
  • —Nicholas Wade
— see bioflavonoid

Recent Examples of flavonoid from the Web

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Origin and Etymology of flavonoid

flavone + -oid


Medical Dictionary

1

flavonoid

adjective fla·vo·noid \ ˈflāv-ə-ˌnȯid , ˈflav- \

medical Definition of flavonoid

: of, relating to, or being a flavonoid

2

flavonoid

noun

medical Definition of flavonoid

: any of a large group of typically biologically active, water-soluble, plant compounds (such as the flavones) that include pigments ranging in color from yellow to red to blue and occur especially in fruits, vegetables, and herbs (such as grapes, citrus fruits, peppers, and dill)
  • Tea contains substances called catechins (tea flavonoids) that may protect against heart disease and even cancer.
  • UC Berkeley Wellness NewsletterNovember 1999
  • Flavonoids are effective scavengers of free radicals in the test tube (in vitro). However, even with very high flavonoid intakes, plasma and intracellular flavonoid concentrations in humans are likely to be 100 to 1000 times lower than concentrations of other antioxidants …
  • —Jane HigdonAn Evidence-Based Approach to Dietary Phytochemicals2007
Note: Flavonoids are polyphenolic 15-carbon compounds with a basic structure consisting of two benzene rings joined by a chain of 3 carbons.
— see bioflavonoid

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