Noun
African tree supposed to mark healthful regions
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
tall fast-growing timber tree with leaves containing a medicinal oil; young leaves are bluish
any of several trees having leaves or bark used to allay fever or thought to indicate regions free of fever
Source: WordNetThere are brands like Fever Tree, Fentimans as well as London Essense and Franklin and Sons. Source: Internet