(1) Of or relating to an anniversary of 100 years or more than hardly anyone remembers or cares about.
(2) Category of numeric terms that inexplicably use the suffix -ial to sound and appear fancy
They've been married like 750 years what should I buy for their toomenial anniversary?
How many years has this school been open? They celebrate their toomenial like every five minutes.
It's not a cardinal or an ordinal, dumbass, it's a toomenial.
Numeric word type used to describe anniversaries and generations in numbers too large to be personally relevant.
Hey it's the country's centennial, or bicentennial, or millenial... or some toomenial, I forget.