fireclay
/ˈfaɪərˌkleɪ/
noun
- A type of clay that can withstand very high temperatures, used to make bricks, furnaces, and fireplaces.
- The potter used fireclay to create oven-safe ceramic dishes.
- The fireplace was built with fireclay bricks to handle the intense heat.
- Fireclay is essential for lining industrial furnaces and kilns.