Sesquicentenary Definition
    noun
  
 A 150 year anniversary.
Wiktionary 
Other Word Forms of Sesquicentenary
Noun
Singular:
 sesquicentenaryPlural:
 sesquicentenariesOrigin of Sesquicentenary
-  sesqui- (“one and a half”) + centenary (“100 year anniversary”) From Wiktionary 
Find Similar Words
Find similar words to sesquicentenary using the buttons below.