quincentenary
Concise Oxford English Dictionary © 2008 Oxford University Press:
quincentenary /ˌkwɪnsɛnˈtiːn(ə)ri, -ˈtɛn-/
▶noun (pl. quincentenaries) a five-hundredth anniversary.
– derivatives
quincentennial noun & adjective.
quincentennial noun & adjective.
'quincentenary' also found in these Oxford entries:

