QED

¹

abbreviation for

, Physics.

1. quantum electrodynamics.

Q.E.D.

²

abbreviation for

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

QED

abbreviation for

1. quod erat demonstrandum
2. quantum electrodynamics

Word History and Origins

Origin of QED¹

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

Word History and Origins

Origin of QED¹

(sense 1) Latin: which was to be shown or proved

Example Sentences

“QED” was not intelligible to him, but it sounded very well indeed, he thought.

From Project Gutenberg