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q.e.d. - 3 dictionary results
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Q.E.D.

 
Use q.e.d. in a Sentence
which was to be shown or demonstrated (used esp. in mathematical proofs).
Origin:
1810–20; < L quod erat dēmōnstrandum
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Q.E.D. 
1760, abbrev. of L. quod erat demonstrandum "which was to be demonstrated."
Online Etymology Dictionary, © 2001 Douglas Harper
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Q.E.D.
Latin quod erat demonstrandum (which was to be demonstrated)
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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