WordNet (r) 3.0 (2006):

Cinchona officinalis
    n 1: Peruvian shrub or small tree having large glossy leaves and
         cymes of fragrant yellow to green or red flowers;
         cultivated for its medicinal bark [syn: calisaya,
         Cinchona officinalis, Cinchona ledgeriana, Cinchona
         calisaya]