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First attested in the 1980s; blend of sesterce (a two and a half coin) + centenary, or from Latin sēster(tius) + centenary.
Etymology from Wiktionary, CC BY-SA 4.0.
sestercentenary
ses·ter·cent·en·aryToday it means: Of or relating to a 250th anniversary, or to a span of 250 years. Full definition →