The Collaborative International Dictionary of English v.0.48:

Copaiba \Co*pai"ba\ (?; 277), Copaiva \Co*pai"va\, n. [Sp. &
   Pg., fr. Brazil. cupa['u]ba.] (Med.)
   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. [Written also capivi.]
   [1913 Webster + WordNet 1.5 +PJC]