English

sestercentenary

First attested in the 1980s; blend of sesterce (a two and a half coin) + centenary, or from Latin sēster(tius) + centenary.

Latin sēstertius ‘two-and-a-half (asses)’

Middle French sesterce

Latin centēnārius ‘containing 100’

first attested First attested in the 1980s (as stated in the etymology)

The story

First attested in the 1980s; blend of sesterce (a two and a half coin) + centenary, or from Latin sēster(tius) + centenary.

adj Of or relating to a 250th anniversary, or to a span of 250 years.

Language periods are conventional ranges, not dates for this word.

Etymograph / sestercentenary