A more or less viscid, yellowish liquid, the bitter oleoresin of several species of Copaifera, a genus of trees growing in South America and the West Indies. It is stimulant and diuretic, and was formerly much used in affections of the mucous membranes. It is also used in varnishes and lacquers, and in cleaning oil paintings. -- called also balsam of copaiba, copaiba balsam, balsam capivi, and Jesuits' resin.

an oleoresin used in varnishes and ointments

Copaiba is a stimulant oleoresin obtained from several pinnate-leaved South American leguminous trees (genus Copaifera). The thick, transparent exudate varies in color from light gold to dark brown, depending on the ratio of resin to essential oil. Copaiba is used in making varnishes and lacquers.