Definition of centenarious in US English:

centenarious

adjective

rare
  • Centenary.

Origin

Early 18th century; earliest use found in Nathan Bailey (d. 1742), lexicographer and schoolmaster. From classical Latin centēnārius containing a hundred, of a hundred years old + -ous.

Pronunciation

centenarious

/ˌsɛntɪˈnɛːrɪəs/