Definition of corundum Corundum
/kɚʌˈndʌm/ - [kerundum] - co•run•dum
We found 5 definitions of corundum from 5 different sources.
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What does corundum mean?
WordNet
Noun |
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| corundum - very hard mineral used as an abrasive | ||
| corundom | ||
| mineral solid homogeneous inorganic substances occurring in nature having a definite chemical composition | ||
| emery a hard grey-black mineral consisting of corundum and either hematite or magnetite; used as an abrasive (especially as a coating on paper) | ||
| alumina, aluminium oxide, aluminum oxide any of various forms of aluminum oxide occurring naturally as corundum | ||
| ruby a transparent piece of ruby that has been cut and polished and is valued as a precious gem | ||
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Wiktionary 
Webster DictionaryWebster's Unabridged Dictionary 📘
- corundum (n.)
The earth alumina, as found native in a crystalline state, including sapphire, which is the fine blue variety; the oriental ruby, or red sapphire; the oriental amethyst, or purple sapphire; and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond.
Chambers DictionaryChamber's 20th Century Dictionary 📕
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corundum
ko-run′dum, n. a mineral consisting of mere alumina, yet of great specific gravity—about four times that of water—and second in hardness only to the diamond. [Hind. kurund.]
Part of speech
🔤- corundum, noun, singular of corundums.
Pronunciation
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