\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 is much used in affections of the mucous membranes; -- called also {balsam of copaiba}. [Written also {capivi}.]