noun
: any of several usually tropical or subtropical shrubs or trees thought to indicate regions free from fever or planted because they yield remedies for fever: as
a. : a blue gum ( Eucalyptus globulus )
b. : an ornamental tree ( Pinckneya pubens ) of the southeastern United States that yields Georgia bark
c. : an African tree ( Acacia xanthophloea ) supposed to mark healthful regions
d. : fever plant 2