Transcription
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- US Pronunciation
- US IPA
- UK Pronunciation
- UK IPA
-
- [kuh-ruhn-duh m]
- /kəˈrʌn dəm/
- /kə.ˈrʌn.dəm/
-
- US Pronunciation
- US IPA
-
- [kuh-ruhn-duh m]
- /kəˈrʌn dəm/
Definitions of corundum word
- noun corundum a white, grey, blue, green, red, yellow, or brown mineral, found in metamorphosed shales and limestones, in veins, and in some igneous rocks. It is used as an abrasive and as gemstone; the red variety is ruby, the blue is sapphire. Composition: aluminium oxide. Formula: Al2O3. Crystal structure: hexagonal (rhombohedral) 3
- noun corundum a very hard mineral, aluminum oxide, Al2O3: a dark, coarse variety (emery) is used for grinding and polishing; clear, transparent varieties (ruby, sapphire) are used as gems 3
- noun corundum a common mineral, aluminum oxide, Al 2 O 3 , notable for its hardness: transparent varieties, as sapphire and ruby, are used as gems, other varieties as abrasives: often made synthetically. 1
- noun corundum Extremely hard aluminum oxide, used as an abrasive. Ruby and sapphire are varieties of corundum. 1
- noun corundum (mineralogy) 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. 0
Information block about the term
Origin of corundum
First appearance:
before 1720 One of the 49% newest English words
1720-30; < Tamil kuruntam; akin to Sanskrit kuruvinda ruby
Historical Comparancy
Parts of speech for Corundum
noun
adjective
verb
adverb
pronoun
preposition
conjunction
determiner
exclamation
corundum popularity
A common word. It’s meaning is known to most children of preschool age. About 78% of English native speakers know the meaning and use the word.
This word is included in each student's vocabulary. Most likely there is at least one movie with this word in the title.
corundum usage trend in Literature
This diagram is provided by Google Ngram ViewerSynonyms for corundum
noun corundum
- jewel — a female given name.
- gem — a cut and polished precious stone or pearl fine enough for use in jewelry.
- paragon — a model or pattern of excellence or of a particular excellence: a paragon of virtue. Synonyms: ideal, standard, epitome, quintessence; example, exemplar, paradigm.
- ice — the solid form of water, produced by freezing; frozen water.
- lozenge — a small, flavored tablet made from sugar or syrup, often medicated, originally diamond-shaped.
Top questions with corundum
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- what do they call a red colored corundum?
- what is the luster of corundum?
- what type of rock is corundum?
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See also
Matching words
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