co·pal /ˈkopəl, ˌpæl; koˈpæl/
柯巴脂
Co·pal A resinous substance flowing spontaneously from trees of Zanzibar, Madagascar, and South America (Trachylobium Hornemannianum, Trachylobium verrucosum, and Hymenæa Courbaril), and dug from earth where forests have stood in Africa; -- used chiefly in making varnishes.
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copal
n : a brittle aromatic resin used in varnishes