| 1. | any of several trees that produce or are believed to produce a febrifuge, as the blue gum, which is believed to prevent malaria. |
| 2. | a small tree, Pinckneya pubens, of the madder family, native to the southeastern U.S., having a bark used as a tonic and febrifuge. |
| fever tree n. Any of several trees, such as certain species of eucalyptus or Pinckneya pubens, of the southeast United States, having leaves or bark used to allay fever. |