Centennial
Centennial , adjective
[Latin centum a hundred + annus year.]
1.
Relating to, or associated with, the commemoration of an event that happened a hundred years before; as, a centennial ode.
2.
Happening once in a hundred years; as, centennial jubilee; a centennial celebration.
3.
Lasting or aged a hundred years.
That opened through long lines
Of sacred ilex and centennial pines.
Centennial , noun
The celebration of the hundredth anniversary of any event; a centenary. [United States]