'Copal' definitions:

Definition of 'copal'

(from WordNet)
noun
A brittle aromatic resin used in varnishes

Definition of 'Copal'

From: GCIDE
  • Copal \Co"pal\ (k[=o]"pal; 277), [Sp., fr. Mexican copalli, a generic name of resins. --Clavigero.] A resinous substance flowing spontaneously from trees of Zanzibar, Madagascar, and South America ({Trachylobium Hornemannianum}, Trachylobium verrucosum, and {Hymen[ae]a Courbaril}), and dug from earth where forests have stood in Africa; -- used chiefly in making varnishes. --Ure. [1913 Webster]