QED
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Q.E.D.
- which was to be shown or demonstrated (used especially in mathematical proofs).
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Origin of Q.E.D.
First recorded in 1810–20, Q.E.D. is from the Latin word quod erat dēmōnstrandum
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for qed
Historical Examples of qed
“QED” was not intelligible to him, but it sounded very well indeed, he thought.
For Fortune and GloryLewis Hough
QED
- quod erat demonstrandum
- quantum electrodynamics
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Word Origin for QED
(sense 1) Latin: which was to be shown or proved
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for qed
Q.E.D.
1760, abbreviation of Latin quod erat demonstrandum "which was to be demonstrated."
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Online Etymology Dictionary, © 2010 Douglas Harper