corundum : Definition, Usages, News and More

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corundum

kuh ruhn duhm

  • n  very hard mineral used as an abrasive

  • Dov Gruner, 33, a Jew with a bullet-crushed jaw and the corundum-hard eyes of an Irgun Zvai Leumi triggerman, stood before a Jerusalem Military Court.
  • Founded in 1902 to mine corundum for use in abrasive wheels, 3M struggled into the manufacture of sandpaper and then into masking tape.
  • Acheson called the stuff "carborundum," because he thought it was composed of corundum and carbon before it was analyzed as silicon carbide.

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