What is the meaning of Cinchona?

A tree or shrub of the genus Cinchona, native to the Andes in South America but since widely cultivated in Indonesia and India as well for its medicinal bark.

The bark of these plants, which yield quinine and other alkaloids useful in reducing fevers and particularly in combatting malaria.

Any medicine chiefly composed of the prepared bark of these plants.

Source: wiktionary.org