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lustrum

 - 2 dictionary results

lus⋅trum

[luhs-truhm]
–noun, plural -trums, -tra [-truh] .
1. Also, luster; especially British, lustre. a period of five years.
2. Roman History. a lustration or ceremonial purification of the people, performed every five years, after the taking of the census.

Origin:
1580–90; < L lūstrum; cf. luster 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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lus·trum   (lŭs'trəm)   
n.   pl. lus·trums or lus·tra (-trə)
  1. A ceremonial purification of the entire ancient Roman population after the census every five years.

  2. A period of five years.


[Latin lūstrum; see luster.]
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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