quindecennial

[kwin-di-sen-ee-uh l]

adjective

of or relating to a period of 15 years or the 15th occurrence of a series, as an anniversary.

noun

a 15th anniversary.

Origin of quindecennial

< Latin quīndec(im) fifteen + -ennial (as in decennial)

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British Dictionary definitions for quindecennial

quindecennial

adjective

occurring once every 15 years or over a period of 15 years

noun

a 15th anniversary

Word Origin for quindecennial

C20: from Latin quindecim fifteen + annus year, on the model of biennial

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