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corundum

/kəˈrʌn.dəm/

1 entry

noun

/kəˈrʌn.dəm/C2formaltechnical
  • ruОчень твёрдый минерал, состоящий из оксида алюминия, часто используемый в качестве абразива в промышленных целях.

A very hard mineral composed of aluminum oxide, often used as an abrasive in industrial applications.

uncountable

  1. C1formaltechnical

    A very hard mineral composed of aluminum oxide, often used as an abrasive or as a gemstone when transparent.

    ruТвёрдый минерал

    • Corundum is one of the hardest naturally occurring minerals.
    • Industrial corundum is used for grinding and polishing metals.
    • Sapphires and rubies are both varieties of corundum.

    Synonymsaluminaaluminum oxide

Forms
  • corundums plural form
  • corundums' possessive plural form
  • corundum's possessive singular form