Bicentennial :: Bicentennial (a.) Consisting of two hundred years.
Bicentennial :: Bicentennial (a.) Occurring every two hundred years.
Bicentennial :: Bicentennial (n.) The two hundredth year or anniversary, or its celebration..
Centennial :: Centennial (a.) Relating to, or associated with, the commemoration of an event that happened a hundred years before; as, a centennial ode..
Centennial :: Centennial (a.) Happening once in a hundred years; as, centennial jubilee; a centennial celebration..
Centennial :: Centennial (a.) Lasting or aged a hundred years.
Centennial :: Centennial (n.) The celebration of the hundredth anniversary of any event; a centenary.