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Reference.org
Centennial
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<p>A centennial, or centenary in <a href="/facts/British_English/ymJR5Rnd">British English</a>, is a 100th <a href="/facts/Anniversary/dXsq9vHt">anniversary</a> or otherwise relates to a <a href="/facts/Century/HGNNAxYj">century</a>. </p>