Noun(1) 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(2) 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
(1) The quassia tree grows from 50 to 100 feet high; it has smooth, gray bark and alternate, odd-pinnate leaves with oblong, pointed leaflets. Its small flowers are yellowish or greenish, its fruit is a small rupe about the size of a pea.(2) This type of size reduction is of dubious value and is only officially used for quassia which is a hard wood.(3) Native to tropical America and the Caribbean, quassia grows in forests and near water.(4) There is preliminary evidence that quassia may be useful in the treatment of leukemia or gastric ulcers.(5) A few preparations make use of digestive enzymes, while many others contain plant substances such as chirata, gentian, calama, quassia , orange peel and many spices.(6) Emetic herbs include bayberry, boneset, buckthorn, culver, false unicorn, lobelia, mandrake, mistletoe, mustard seed, pleurisy, quassia , rue and senega(7) The burning of scents like frankincense and myrrh dates back to the ancient Egyptians, and continued through the centuries, gradually including sweet spices like cinnamon, quassia , cloves, allspice and nutmeg.(8) Several early clinical studies performed on quassia verified its traditional use as a natural insecticide, documenting it as an effective treatment for head lice infestation in humans.