firebrick

a brick capable of withstanding high temperatures without deforming.

Japanese Meaning

耐火レンガ：高温に耐え、変形しないレンガ

The potter carefully lined the kiln with firebrick to ensure it could reach the needed high temperatures.

陶芸家は必要な高温に達するように、窯の内側を耐火レンガで慎重に内張りした。

Sense（1）

a brick capable of withstanding high temperatures without deforming.

Eastleigh Locomotive Works: Layout and functions of shops … Brick Shop: Manufacture of firebricks.

firebricks

（ plural ）