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carborundum

Line breaks: car¦bor|un¦dum
Pronunciation: /ˌkɑːbəˈrʌndəm
 
/

Definition of carborundum in English:

noun

[mass noun] trademark
A very hard black solid consisting of silicon carbide, used as an abrasive.
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.

Origin

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

Definition of carborundum in:

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