Definition of carborundum in English:


Syllabification: car·bo·run·dum
Pronunciation: /ˌkärbəˈrəndəm


A very hard black solid consisting of silicon carbide, used as an abrasive.
More example sentences
  • A compound known as silicon carbide, also known as carborundum, is one of the hardest substances known.
  • Control plants were also dusted with carborundum and mock inoculated with a sample volume of potassium phosphate buffer.
  • Before inoculating, 600-mesh carborundum was dusted on the leaves.


late 19th century (originally US, as a trademark): blend of carbon and corundum.

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cause (someone) to lose confidence or hope