genus Phoradendron ge·nusp·ho·radendron uncommon noun 1. any of various American parasitic plants similar to Old World mistletoe: false mistletoe SynonymsPhoradendrongenus Phoradendron Related words Broader terms dilleniid dicot genus Parts Viscaceae Part of mistletoe WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.