Definition/Meaning of QED

• English - Interjection: QED Quod erat demonstrandum (Latin what had to be proved or what was to be demonstrated ). Usage notes When used to end a mathematical proof , QED is somewhat archaic or traditional; textbooks often use a graphical symbol instead . Further , other languages generally use a vernacular abbreviation , such as French CQFD ( “ ce qu'il fallait démontrer ” ); QED is primarily used in English and…
• English - Noun: QED Quantum electrodynamics . 2011 , Brian Cox & Jeff Forshaw, The Quantum Universe , Allen Lane 2011, p . 176: QED is the theory that explains how electrically charged particles , like electrons , interact with each other and with particles of light (photons). Related terms ( quantum ) : QCD
• English - Alternative forms: Q . E . D ., q . e . d .
• English - Anagrams: DEQ
• Latin - Initialism: QED QED