<p><strong>Noun</strong></p><ul><li>a shrub or small tree, Quassia amara, of tropical America, having pinnate leaves, showy red flowers, and wood with a bitter taste</li><li>any of several other trees having bitter-tasting wood</li><li>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</li></ul>