Found 2 items, similar to centennially.
English → English (WordNet) Definition: centennially centennially adv : every hundred years; once in a century; “the birthday of this city is being celebrated centennially”
English → English (gcide) Definition: Centennially Centennially \Cen*ten"ni*al*ly\, adv. Once in a hundred years. [1913 Webster]