English Noun English Wikipedia has an article on:flavonolWikipedia flavonol (plural flavonols) (organic chemistry) Any of several flavonoids that have a 3-hydroxyflavone backbone. Hyponyms quercetin Derived terms isoflavonolphytoflavonolprenylflavonolpyranoflavonolsophoraflavonoloside Spanish Noun flavonol m (plural flavonoles) (organic chemistry) flavonolWikiwand - on Seamless Wikipedia browsing. On steroids.