The Collaborative International Dictionary
Quercitin
Quercitin \Quer"ci*tin\ (kw[~e]r"s[i^]*t[i^]n), n. (Chem.) A yellow crystalline substance, occurring quite widely distributed in the vegetable kingdom, as in apple-tree bark, horse-chestnut leaves, etc., but originally obtained by the decomposition of quercitrin. Called also meletin.
Wiktionary
quercitin
n. (context organic compound English) A flavonoid found in fruits, vegetables, leaf and grains.