Definition of flavone in US English:

flavone

noun

Chemistry
  • 1A colorless crystalline compound which is the basis of a number of white or yellow plant pigments.

    A tricyclic aromatic compound; chemical formula: C₁₅H₁₀O₂

    • ‘Flavonoids are composed of different chemical classes such as flavones, isoflavones, flavonols, flavanols, flavanones, and chalcones.’
    • ‘Flavonoids are plant derivatives of flavone with various degrees of hydroxylation and glycosidic substitutions.’
    • ‘The flavone apigenin, found in high concentrations in parsley, provides an effect similar to that of 13C - protecting the body from bad estrogens.’
    • ‘It has been recently reported the presence in Valeriana of the flavone 6-methylapigenin and the flavanone glycoside hesperidin.’
    • ‘Consisting of approximately 2,200 compounds, the flavonoid family of chemicals consists also of the closely related flavones, flavonones, and flavonols.’
    1. 1.1 Any of the plant pigments of which flavone is the basis.
      • ‘Honeysuckle flowers contain flavonols, flavones, catechins, isoflavanones, and anthocyanins.’
      • ‘The secretory four-celled head showed up in the developing stage, becoming stained fluorescent orange with the Naturstoffreagent A which indicated flavones.’
      • ‘Maysin accumulation is correlated with a phenotype termed silk browning, in which the cut ends of silks turn brown due to the oxidation of flavones.’
      • ‘In the pre-stages, when the base and stalk cells were not fully developed, Naturstoffreagent A gave an orange-yellow fluorescence to flavones.’
      • ‘Related flavonoids (i.e. flavones, flavonoles, chalcones) also contribute to colour definition.’

Origin

Late 19th century: from Latin flavus ‘yellow’ + -one.

Pronunciation

flavone

/ˈflāvōn//ˈfleɪvoʊn/