Source : WordNet®

fever tree
     n 1: any of several trees having leaves or barks used to allay
          fever or thought to indicate regions free of fever
     2: 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}]
     3: tall fast-growing timber tree with leaves containing a
        medicinal oil; young leaves are bluish [syn: {blue gum}, {Eucalyptus
        globulus}]
     4: African tree supposed to mark healthful regions [syn: {Acacia
        xanthophloea}]