A hundred years is a century.
A word for a hundred years is a century. A word for fifty years is half a century.
The word for a hundred and fiftieth anniversary is "sesquicentennial." This term is derived from the Latin roots "sesqui," meaning one and a half, and "centennial," which refers to a hundred years. Sesquicentennial celebrations are often marked with special events, commemorations, or gatherings.
century
Centenary
The word bicentennial.
"Bicentennial" means something that is two hundred years old.
sesquicentennial
There are a hundred years in a century.
century
The word is... bicentennial.
Bientum. Coming for the Latin word "Centum" meaning one hundred.
Millenium Actually, a millennium is a thousand years. That is ten centuries NOT a hundred centuries. There is no single word to describe a hundred centuries.