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lunation

 - 2 dictionary results

lu⋅na⋅tion

  [loo-ney-shuhn]
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–noun
the period of time from one new moon to the next (about 29 1/2 days); a lunar month.
Origin:
1350–1400; ME lunacyon < ML lūnātiōn- (s. of lūnātiō). See Luna, -ation
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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lu·na·tion   (lōō-nā'shən)   
n.  The time that elapses between successive new moons, averaging 29 days, 12 hours, 44 minutes; a lunar month.

[Middle English lunacioun, from Medieval Latin lūnātiō, lūnātiōn-, from Latin lūna; see lunar.]
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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