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semiquincentennial.

Of or relating to a 250th anniversary.

18 characters6 syllables approx.English language

Meaning & usage

adj/ˌsɛ.miˌkwɪn.sɛnˈtɛn.i.əl/Received-Pronunciation/ˌsɛ.miˌkwɪn.sɛnˈtɛn.i.əl/General-American/-maɪ-/General-American

  1. Of or relating to a 250th anniversary.

    not-comparable
Where this word comes from

Etymology tree Proto-Indo-European *sem- Proto-Indo-European *sēmi Latin sēmi-bor. English semi- Proto-Indo-European *pénkʷe Proto-Italic *kʷenkʷe Latin quīnqueder. English quin- Latin centennis Proto-Indo-European *-(i)yós Proto-Italic *-ijos Proto-Italic *-ios Old Latin -ios Latin -iusnom. Latin -ium Late Latin centennium Proto-Indo-European *h₂el- Proto-Indo-European *-is Proto-Indo-European *h₂élisder.? Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al English -al English centennial English quincentennial English semiquincentennial From semi- (prefix meaning ‘half’) + quincentennial (“500th anniversary”).

noun/ˌsɛ.miˌkwɪn.sɛnˈtɛn.i.əl/Received-Pronunciation/ˌsɛ.miˌkwɪn.sɛnˈtɛn.i.əl/General-American/-maɪ-/General-American

  1. A 250th anniversary.

    The year 2026 will mark the semiquincentennial of the founding of the United States.
Where this word comes from

Etymology tree Proto-Indo-European *sem- Proto-Indo-European *sēmi Latin sēmi-bor. English semi- Proto-Indo-European *pénkʷe Proto-Italic *kʷenkʷe Latin quīnqueder. English quin- Latin centennis Proto-Indo-European *-(i)yós Proto-Italic *-ijos Proto-Italic *-ios Old Latin -ios Latin -iusnom. Latin -ium Late Latin centennium Proto-Indo-European *h₂el- Proto-Indo-European *-is Proto-Indo-European *h₂élisder.? Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al English -al English centennial English quincentennial English semiquincentennial From semi- (prefix meaning ‘half’) + quincentennial (“500th anniversary”).

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.