quassia

A tropical American shrub or small tree (Quassia amara) having bright scarlet flowers and yielding a fine-grained, yellowish-white wood.

The wood of this plant.

A bitter substance obtained from the wood of this plant or related plants in the family Simaroubaceae, used in medicine and formerly as an insecticide.

Any of several tropic trees, of the genus Quassia, having scarlet flowers

The bitter substance quassin extracted from its bark