carborundum
/ˌkɑːrbəˈrʌndəm/
noun
- A very hard, dark-colored material made of silicon and carbon, used for grinding, polishing, and cutting hard surfaces.
- The jeweler used a carborundum wheel to polish the diamond.
- Carborundum is often found in sandpaper for smoothing wood or metal.
- Workers wear masks when cutting carborundum to avoid breathing in the dust.
Synonyms