Acokanthera aco·kant·hera uncommon noun 1. small genus of trees and shrubs containing strongly toxic cardiac glycosides; Arabia to Africa SynonymsAcocantheragenus Acocantheragenus Acokanthera Related words Broader terms dicot genus Parts Apocynaceae Part of winter sweetbushman's poison WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.