QED

¹ American  

abbreviation

Physics.

1. quantum electrodynamics.

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Q.E.D. ² American  

abbreviation

1. which was to be shown or demonstrated (used especially in mathematical proofs).

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QED British  

abbreviation

1. quod erat demonstrandum

2. quantum electrodynamics

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Etymology

Origin of Q.E.D.

First recorded in 1810–20, Q.E.D. is from Latin quod erat dēmōnstrandum

Example Sentences

In the electron's reference frame, the laser intensity appeared to be about 50% of the Schwinger limit, triggering nonlinear QED phenomena.

From Science Daily

Leaders rejected Tremmel’s initial pitch because of QED’s lack of professional registrations, clients or track record.

From Seattle Times

If successful, they could confirm QED once more.

From Science Daily

"Any fintech with serious, long-term ambitions will likely have to find a way to become a bank," says Mike Packer, an investor at QED, a venture capital fund which has backed several lending fintechs.

From Reuters

It produced its first commercial MRI machine, QED 80, in 1980.

From Washington Post