quod-erat-demonstrandum
Definition, pronunciation, etymology, and usage for the English word. Free spelling reference powered by Wiktionary.
Letters
23 characters
Language
English
word origin
Source
Wiktionary
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Detailed reference entry for the English word "quod-erat-demonstrandum", 23-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Wiktionary, and usage frequency ranked against an open word-frequency list covering the top 100,000 English words. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "quod-erat-demonstrandum" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "quod-erat-demonstrandum" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.
quod erat demonstrandum is aEnglishphrase. It means: which was to be proved; which was to be demonstrated.
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Browse all word comparisons →| Property | Value |
|---|---|
| Headword | quod erat demonstrandum |
| Language | English |
| Part of speech | Phrase |
| Letters | 23 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Frequency rank visualization
Spelling & Dictionary Insight
The English entry for quod erat demonstrandum is 23 letters long, classified as aphrase. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader.The dominant gloss from Wiktionary reads: "which was to be proved; which was to be demonstrated.".
No misspelling variants are generated for quod erat demonstrandum in our index, suggesting the orthography follows predictable English patterns.It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: 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”). Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is quod erat demonstrandum, spelled Q-U-O-D- -E-R-A-T- -D-E-M-O-N-S-T-R-A-N-D-U-M, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.
Definition
- 1which was to be proved; which was to be demonstrated.
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”).
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Nearby English words
Other entries that begin with the letter Q in our English index: