Quindecennial meaning

kwĭndĭ-sĕnē-əl
Occurring once every 15 years.
adjective
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Lasting 15 years.
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A 15th anniversary.
noun
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Happening every fifteen years.
adjective
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Lasting fifteen years.
adjective
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A fifteenth anniversary or its commemoration.
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Lasting fifteen years.
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Happening once in fifteen years.
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Origin of quindecennial

  • From Latin quīndecim fifteen penkwe in Indo-European roots Latin -ennium (from annus year at- in Indo-European roots)

    From American Heritage Dictionary of the English Language, 5th Edition