corundum
/kəˈɹʌn.dəm/noun
corundum is spelled C-O-R-U-N-D-U-M. The wrong spelling people search most is curundum: about 10 Bing searches a month in the United States (September 2025 to August 2026), about 1 in 143 of all searches for the word. Corundum is a noun meaning “An extremely hard mineral, a form of aluminum oxide with the chemical formula Al₂O₃, that occurs in the form…”. The plural of corundum is corundums.
How many letters and syllables are in corundum?
| Letters | 8: C-O-R-U-N-D-U-M |
|---|---|
| Syllables | 3 (from its American pronunciation) |
| In writing | about once in every 13 million words; the 106,501st most frequent word form |
| Wrong spellings searched | 1; the most searched, curundum, about 10 Bing searches a month (all of them) |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).
How do you spell corundum?
Corundum is spelled C-O-R-U-N-D-U-M. One wrong spelling is searched or written often enough to measure; together they are about 1 in 143 of the searches for corundum in either form.
Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026). Wrong spellings are taken from Wiktionary entries tagged "misspelling" and its obsolete or nonstandard forms, Wikipedia's Lists of common misspellings and the codespell dictionary, then measured. The proofreader's marks show the change that corrects each one.
How common is corundum?
Corundum appears about once in every 13 million words in written English, the 106,501st most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce corundum?
- US /kəˈɹʌn.dəm/
Corundum has 3 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-corundum.wav, Wikimedia Commons (author and licence on each file's page).
Forms of corundum
- corundums plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does corundum mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
An extremely hard mineral, a form of aluminum oxide with the chemical formula Al₂O₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Corundum in Spanish, French, German and Portuguese
In the sense mineral:
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does corundum come from?
From Tamil குருந்தம் (kuruntam, “ruby, sapphire”) First attested in the early 18th century.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).