- quassia - a bitter compound used as an insecticide and tonic and vermifuge; extracted from the wood and bark of trees of the genera Quassia and Picrasma
--1 is a kind of organic compound
--1 has particulars: Jamaica quassia- quassia, bitterwood, Quassia amara - handsome South American shrub or small tree having bright scarlet flowers and yielding a valuable fine-grained yellowish wood; yields the bitter drug quassia from its wood and bark
--2 is a kind of bitterwood tree
--2 is a member of genus Quassia - quassia, bitterwood, Quassia amara - handsome South American shrub or small tree having bright scarlet flowers and yielding a valuable fine-grained yellowish wood; yields the bitter drug quassia from its wood and bark