quinquagenary

[ kwin-kwah-juh-ner-ee, kwing- ]

noun,plural quin·quag·e·nar·ies.
  1. a 50th anniversary.

Origin of quinquagenary

1
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. 2024