Pronunciation: (sing-kō'nu, sin-),[key] —n. 1. any of several trees or shrubs of the genus Cinchona, of the madder family, esp. C. calisaya, native to the Andes, cultivated there and in Java and India for its bark, which yields quinine and other alkaloids.
2. Also called Jesuit's bark, Peruvian bark. the medicinal bark of such trees or shrubs.