The story
- New Latin · borrowed fromquincentennium“500-year period”
- English todayquincentennium
From New Latin quincentennium (“500-year period”). Compare the classical Latin form quingenti (“500”). Equivalent to quin- (“five”) + centennium (“century, 100-year period”). Cognate with quincentenary and quincentennial.
Etymology from Wiktionary, CC BY-SA 4.0.