A very hard black solid consisting of silicon carbide, used as an abrasive.
- 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.
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