Quas·si·a n. The wood of several tropical American trees of the order Simarubeæ, as Quassia amara, Picræna excelsa, and Simaruba amara. It is intensely bitter, and is used in medicine and sometimes as a substitute for hops in making beer.
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Stave·wood n. Bot. A tall tree (Simaruba amara) growing in tropical America. It is one of the trees which yields quassia.
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