a shrub or small tree, Quassia amara,
of tropical America, having pinnate leaves, showy red flowers, and wood with a bitter taste. Compare quassia family
any of several other trees having bitter-tasting wood.
3. Also called bitterwood. Chemistry, Pharmacology.
a prepared form of the heartwood of any of these trees, used as an insecticide and in medicine as a tonic to dispel intestinal worms.
named after Quassi,
18th-century slave in Dutch Guiana who discovered its medicinal properties; see -ia