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sesquicentennial

[ses-kwi-sen-ten-ee-uh l] /ˌsɛs kwɪ sɛnˈtɛn i əl/
adjective
1.
pertaining to or marking the completion of a period of 150 years.
noun
2.
a 150th anniversary or its celebration.
Origin
1875-1880
1875-80, Americanism; sesqui- + centennial
Related forms
sesquicentennially, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for sesquicentennial
  • And of course interest is high, now that we've begun commemorating the sesquicentennial anniversaries of the war's key events.
  • As the sesquicentennial begins, this article repeats two.
  • Iowans will take their presentation home to celebrate their sesquicentennial of statehood.
  • With a summer full of festivals ahead of us, the sesquicentennial celebrations are only beginning.
British Dictionary definitions for sesquicentennial

sesquicentennial

/ˌsɛskwɪsɛnˈtɛnɪəl/
adjective
1.
of or relating to a period of 150 years
noun
2.
a period or cycle of 150 years
3.
a 150th anniversary or its celebration
Derived Forms
sesquicentennially, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for sesquicentennial
adj.

"pertaining to a century and a half," 1878, from sesqui- + centennial. As a noun from 1880; first recorded reference is to Baltimore's.

Online Etymology Dictionary, © 2010 Douglas Harper
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