seicentenario

== Italian == === Etymology === From seicento +‎ -enario. By surface analysis, sei +‎ centenario. Cognate with French six-centenaire. === Adjective === seicentenario (feminine seicentenaria, masculine plural seicentenari, feminine plural seicentenarie) sexcentennial === Noun === seicentenario m (plural seicentenari) sexcentennial === Coordinate terms ===