Latin Etymology From excīdō (“I cut or hew out, off, or down”) + -tiō. Noun excīsiō f (genitive excīsiōnis); third declension cutting off, out or down excision destroying Declension Third-declension noun.More information singular, plural ... singular plural nominative excīsiō excīsiōnēs genitive excīsiōnis excīsiōnum dative excīsiōnī excīsiōnibus accusative excīsiōnem excīsiōnēs ablative excīsiōne excīsiōnibus vocative excīsiō excīsiōnēs Close Descendants Catalan: excisió English: excision Spanish: excisión References “excisio”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press “excisio”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers excisio in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.Wikiwand - on Seamless Wikipedia browsing. On steroids.