\Cin*cho"na\, n. [So named from the wife of Count
Chinchon, viceroy of Peru in the seventeenth century, who by
its use was freed from an intermittent fever, and after her
return to Spain, contributed to the general propagation of
this remedy.]
1. (Bot.) A genus of trees growing naturally on the Andes in
   Peru and adjacent countries, but now cultivated in the
   East Indies, producing a medicinal bark of great value.
2. (Med.) The bark of any species of {Cinchona} containing
   three per cent. or more of bitter febrifuge alkaloids;
   Peruvian bark; Jesuits' bark.