Sesquicentennial Definition
sĕskwĭ-sĕn-tĕnē-əl
adjective
Of or ending a period of 150 years.
Webster's New World
noun
A 150th anniversary or its commemoration.
Webster's New World
Other Word Forms of Sesquicentennial
Noun
Singular:
sesquicentennial
Plural:
sesquicentennialsOrigin of Sesquicentennial
-
sesqui- (“one-and-a-half") +"Ž centennial (“of 100 years")
From Wiktionary
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