Fever Tree
WordNet
noun
(1) African tree supposed to mark healthful regions
(2) Tall fast-growing timber tree with leaves containing a medicinal oil; young leaves are bluish
(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
(4) Any of several trees having leaves or barks used to allay fever or thought to indicate regions free of fever