sesquicentennial

[ ses-kwi-sen-ten-ee-uh l ]
/ ˌsɛs kwɪ sɛnˈtɛn i əl /

adjective

pertaining to or marking the completion of a period of 150 years.

noun

a 150th anniversary or its celebration.

Origin of sesquicentennial

An Americanism dating back to 1875–80; sesqui- + centennial

OTHER WORDS FROM sesquicentennial

ses·qui·cen·ten·ni·al·ly, adverb

Example sentences from the Web for sesquicentennial

British Dictionary definitions for sesquicentennial

sesquicentennial
/ (ˌsɛskwɪsɛnˈtɛnɪəl) /

adjective

of or relating to a period of 150 years

noun

a period or cycle of 150 years
a 150th anniversary or its celebration

Derived forms of sesquicentennial

sesquicentennially, adverb