quindecennial [kwin-di-sen-ee-uh l] Word Origin adjective
- of or relating to a period of 15 years or the 15th occurrence of a series, as an anniversary.
- a 15th anniversary.
Origin of quindecennial Latin quīndec(im) fifteen + -ennial (as in) British Dictionary definitions for quindecennial quindecennial adjective
- occurring once every 15 years or over a period of 15 years
- a 15th anniversary
Word Origin for quindecennial C20: from Latin quindecim fifteen + annus year, on the model of biennial