alundum

• Существительное, обозначающее вещество из плавленого глинозема, часто используемое в качестве абразивного или огнеупорного материала.

A noun referring to a substance made of fused alumina, often used as an abrasive or refractory material.

uncountable

1. Fused aluminaC2formaltechnical

   A hard, synthetic substance made by fusing alumina (aluminum oxide) at high temperatures, used as an abrasive or refractory material.

   Плавленый глинозем

   • Alundum is commonly used in grinding wheels and cutting tools.
   • The furnace lining was made of alundum bricks to withstand high heat.
   • Laboratories use alundum crucibles for high-temperature experiments.