quadricentennial

English

Etymology

From quadri- +‎ centennial.

Adjective

quadricentennial (not comparable)

1. Relating to a 400th anniversary.

Noun

quadricentennial (plural quadricentennials)

1. A 400th anniversary.
   • 2011, Robert Alexander González, Designing Pan-America, page 54:

     The Cayuga fairground proposal recalled other Pan-American heritage themes that emerged with the quadricentennials. There was mention of a theme area on the island where reproductions of ancient structures of the Americas would be juxtaposed with reproductions of the birthplaces of U.S. American historical figures.