Etymology

sesquicentenary

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Today it means: A 150-year anniversary. Full definition →

English centenary ← Latin centēnārius
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The story

  1. Englishsesqui-
  2. Latincentēnārius
  3. Englishcentenary
  4. English todaysesquicentenary

From sesqui- (“one and a half”) + centenary (“100 year anniversary”).

Etymology from Wiktionary, CC BY-SA 4.0.