Bicentennial

Origin

From Latin bi two + centum hundred + annus year + -al

Full definition of bicentennial

Adjective

1. Relating to the 200th anniversary of an event or happening.
2. Occurring every two hundred (200) years

Noun

1. The 200th anniversary of an event or happening.The US bicentennial in 1976 was celebrated greatly because the economy happened to be good.