n. 1. An arborescent cactus of Western Mexico (Myrtillocactus geometrizans) bearing a small oblong edible berrylike fruit. Syn. -- garambulla cactus, Myrtillocactus geometrizans. [ WordNet 1.5 ]
2. The small berrylike fruit of the Myrtillocactus geometrizans. [ WordNet 1.5 ]