sesquicentenary
/ˌsɛskwɪˈsɛntɪnɛri/
noun
- A 150th anniversary or the celebration of it.
- The museum opened a special exhibit to mark the sesquicentenary of the artist's birth.
- The town is planning a huge parade for its sesquicentenary next summer.
- She wrote a book about the university's sesquicentenary celebrations.
Synonyms