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decennial

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(dē sen′ē əl)

adjective

happening every ten years
lasting ten years

Origin: < L decennium (see decennium) + -al

noun

a tenth anniversary or its commemoration

Related Forms:

decennially adverb

See decennial in American Heritage Dictionary 4

adjective

Relating to or lasting for ten years.
Occurring every ten years.

noun

A tenth anniversary.

Origin:

Origin: From Latin decennium, a period of ten years; see decennium

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Related Forms:

de·cenˈni·al·ly adverb

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