genus Mandevilla ge·nus·man·devilla uncommon noun 1. genus of tropical South American tuberous perennial woody vines with large racemose flowers and milky sap SynonymsMandevillagenus MandevillaDipladeniagenus Dipladenia Related words Broader terms dicot genus Parts Apocynaceae Part of white dipladeniaChilean jasmine WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.