quinquagenary
[kwin-kwah-juh-ner-ee, kwing-]
- a 50th anniversary.
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Origin of quinquagenary
1580–90; < Latin quīnquāgēnārius containing fifty, equivalent to quīnquāgēn(ī) fifty each + -ārius -ary
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018