Caranna is a hard, brittle, resinous gum, obtained from the West Indian tree Bursera acuminata (family Amyridaceae). It has an aromatic flavor, and was used in pre-modern medicine.
This article incorporates text from a publication now in the public domain: Chambers, Ephraim, ed. (1728). "article name needed". Cyclopædia, or an Universal Dictionary of Arts and Sciences (first ed.). James and John Knapton, et al.
References
Caranna Wikipedia(Text) CC BY-SA