Quick definitions from WordNet (fever tree)
▸ noun: African tree supposed to mark healthful regions
▸ noun: 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
▸ noun: any of several trees having leaves or barks used to allay fever or thought to indicate regions free of fever
▸ noun: tall fast-growing timber tree with leaves containing a medicinal oil; young leaves are bluish
▸ noun: African tree supposed to mark healthful regions
▸ noun: 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
▸ noun: any of several trees having leaves or barks used to allay fever or thought to indicate regions free of fever
▸ noun: tall fast-growing timber tree with leaves containing a medicinal oil; young leaves are bluish