quindecennial

[kwin-di-sen-ee-uhl]

quin·de·cen·ni·al

[kwin-di-sen-ee-uhl]
adjective
1.
of or pertaining to a period of 15 years or the 15th occurrence of a series, as an anniversary.
noun
2.
a 15th anniversary.

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Quindecennial has a plethora of syllables.
So is floccinaucinihilipilification. Does it mean:
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
opposition to the withdrawal of state support or recognition from an established church, esp. the Anglican Church in 19th-century England.

Origin:
< Latin quīndec(im) fifteen + -ennial (as in decennial)
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To quindecennial
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World English Dictionary
quindecennial (ˌkwɪndɪˈsɛnɪəl)
 
adj
1.  occurring once every 15 years or over a period of 15 years
 
n
2.  a 15th anniversary
 
[C20: from Latin quindecim fifteen + annus year, on the model of biennial]

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