bitterbark

\\ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷\ noun

1. : any of several woody plants having bitter bark: as

a. Australia

(1) : a woody shrub (Alstonia constricta) with a bark sometimes used as a febrifuge

(2) : native quince

(3) : a shrub or small tree (Tabernaemontana orientalis) having evergreen leaves, sweet-scented flowers with slender tubes, and orange-colored fruit

b. : fever tree b

c. : cascara buckthorn

2. : the bark from a bitterbark especially when used medicinally