quasquicentennial

[kwos-kwi-sen-ten-ee-uh l]

adjective

pertaining to or marking a period of 125 years.

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noun

a 125th anniversary.
a celebration marking such an anniversary.

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Origin of quasquicentennial

quasqui- one and a quarter (pseudo-Latin, apparently qua(dri-) + (se)squi-) + centenial

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018