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corundum in British English
(kəˈrʌndəm)
noun
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)
Word origin
C18: from Tamil kuruntam; related to Sanskrit kuruvinda rubycorundum in American English
(kəˈrʌndəm)
noun
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
see also Mohs scale Word origin
Tamil kurundam < Sans kuruvinda, rubyImage ofcorundum
© Gozzoli, shutterstock
Examples of 'corundum' in a sentencecorundum
Word lists withcorundum
gem, mineral- fissile
- fissilingual
- fissility
- fission
- fissionability
- fissionable
- fissional
- fission bomb
- fissioned
- fission-fusion bomb
- fission product
- fission reactor
- fission-track dating
- fissipalmate
- fissiparism
- fissiparity
- fissiparous
- fissiparously
- fissiparousness
- fissiped
- fissipede
- fissirostral
- fissive
- fissle
- fissural