1. any of several trees having leaves or bark used to allay fever or thought to indicate regions free of fever • Hypernyms: tree 2. tall fast-growing timber tree with leaves containing a medicinal oil; young leaves are bluish • Syn: blue gum, Eucalyptus globulus • Hypernyms: eucalyptus, eucalypt, eucalyptus tree 3. ornamental shrub or small tree of swampy areas in southwestern United States having large pink or white sepals and yielding Georgia bark for treating fever • Syn: Georgia bark, bitter-bark, Pinckneya pubens • Hypernyms: shrub, bush • Member Holonyms: Pinckneya, genus Pinckneya 4. African tree supposed to mark healthful regions • Syn: Acacia xanthophloea • Hypernyms: acacia • Member Holonyms: genus Acacia