Sestercentennial

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
A 250th anniversary.
"The United States will mark the sestercentennial of its founding in 2026."

Synonyms

semiquincentennial

Example

"The United States will mark the sestercentennial of its founding in 2026."

Etymology

From Latin sēmis + tercentennial, literally “two hundred fiftieth anniversary”.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.