tredecennium

== Latin == === Etymology === From trēdecim (“thirteen”) +‎ annus (“year”) +‎ -ium. === Noun === trēdecennium n (genitive trēdecenniī or trēdecennī); second declension (New Latin) a thirteen-year period ==== Declension ==== Second-declension noun (neuter). 1Found in older Latin (until the Augustan Age). ==== Descendants ==== English: tredecennial === References === “tredecennium”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette. tredecennium in Ramminger, Johann (16 July 2016 (last accessed)), Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700‎[1], pre-publication website, 2005-2016