quatercentenary

 
Pronunciation: /ˌkwatəsɛnˈtiːn(ə)ri, -ˈtɛn-, ˌkweɪtə-/

noun (plural quatercentenaries)

  • the four-hundredth anniversary of a significant event: the quatercentenary of the college’s foundation

adjective

  • relating to a four-hundredth anniversary.

Origin:

late 19th century: from Latin quater 'four times' + centenary