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]