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decennium

 - 2 dictionary results

de⋅cen⋅ni⋅um

  [di-sen-ee-uhm]
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–noun, plural -cen⋅ni⋅ums, -cen⋅ni⋅a  [-sen-ee-uh] .
a period of ten years; a decade.
Origin:
1675–85; < L; see decennial
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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de·cen·ni·um   (dĭ-sěn'ē-əm)   
n.   pl. de·cen·ni·ums or de·cen·ni·a (-sěn'ē-ə)
A period of ten years; a decade.

[Latin, from decennis, lasting for ten years : decem, ten; see dek in Indo-European roots + annus, year; see at- in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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