fever tree

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of several trees having leaves or bark used to allay fever or sometimes thought to cause fever, especially Pinckneya bracteata of the southeast United States, Acacia xanthophloea of southern Africa, certain species of eucalyptus, or cinchona.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• 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 any of several trees having leaves or bark used to allay fever or thought to indicate regions free of fever
• 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