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semicentennial

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noun semi·cen·ten·ni·al \ ˌse-mē-sen-ˈte-nē-əl , ˌse-ˌmī- , -mi- \
Updated on: 11 Sep 2017

Definition of semicentennial

:a 50th anniversary or its celebration
—

semicentennial

adjective

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First Known Use of semicentennial

1859

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