cissus Syllabification: (cis·sus)Pronunciation: /ˈsisəs/Definition of cissus noun a woody climbing vine of the grape family, with trifoliate leaves that are sometimes evergreen. Genus Cissus, family Vitaceae: several species, especially C. incisa of the central and southeastern US Origin:modern Latin: from Greek kissos 'ivy'cissus in other Oxford dictionaries Definition of cissus in the British & World English dictionary