noun. A crystalline compound, C₁₅H₁₀O₂, the parent substance of a number of important yellow pigments, occurring on the leaves or in the stems and seed capsules of many primroses.

noun. Any of a class of crystalline flavonoids that are found in citrus fruits, celery, and other foods.

noun. A group of naturally occurring yellow coloring-matters, some members of which are used as dyes. The parent substance is called phenylpheno-γ-pyrone, C₁₅H₁₀O₂.

noun. any of a class of tricyclic aromatic heterocyclic ketones, especially the naturally occurring flavonoids

noun. (uncountable) the parent compound of this class

noun. a colorless crystalline compound that is part of a number of white or yellow plant pigments

"The usual dose is 60 mg twice a day, and it should be standardized to 24 percent flavone glycosides or ginkgolides."

chemical compound  compound  

acyclic  anthracene  biloba  carboxylic  cyanidin