quod erat demonstrandum

== English == === Etymology === Borrowed from Latin quod erat dēmōnstrandum (“that which was to be proved”), calqued from Ancient Greek ὅπερ ἔδει δεῖξαι (hóper édei deîxai, “precisely what was required to be proved”). === Pronunciation === === Phrase === quod erat demonstrandum (plural quae erant demonstranda) (Something) which was to be proved; which was to be demonstrated. ==== Derived terms ==== ==== Translations ==== == Latin == === Etymology === Calque of Ancient Greek ὅπερ ἔδει δεῖξαι (hóper édei deîxai, literally “(that) which was to be demonstrated”). === Pronunciation === (Classical Latin) IPA(key): [ˈkʷɔ.dɛ.rad.deː.mõːsˈtran.dũː] (modern Italianate Ecclesiastical) IPA(key): [ˈkʷɔd ˈɛː.rat de.monˈstran.dum] === Phrase === quod erat dēmōnstrandum (plural quae erant dēmōnstranda) which was to be proved; which was to be demonstrated. ==== Derived terms ==== q. e. d., Q. E. D., QED == Norwegian Bokmål == === Etymology === Borrowed from Latin. === Interjection === quod erat demonstrandum quod erat demonstrandum === References === “quod erat demonstrandum” in The Bokmål Dictionary. == Norwegian Nynorsk == === Etymology === Borrowed from Latin. === Interjection === quod erat demonstrandum quod erat demonstrandum === References === “quod erat demonstrandum” in The Nynorsk Dictionary. == Portuguese == === Phrase === quod erat demonstrandum quod erat demonstrandum (which was to be demonstrated) Synonyms: QED, CQD === Further reading === “quod erat demonstrandum”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026