quassia

(kwash'yah) [named from a Negro in Surinam who employed it as a tonic] (U.S.) Qua ia ligniun (Br.), bitterwood, the wood of Picrasma excels a {Picrcena excels a), or of Qua ia amara; it is marketed as Jamaica q. and Surinam q. It is employed as a bitter tonic in doses of gr. 5-30 (0.3—2.0). The infusion is used as an injection for the destruction of thread worms, q. cup, a cup made of q. wood in which water is allowed to stand over night, acquiring thus the tonic properties of the wood.