Definitions

1. noun

a type of refractory brick made from fire-resistant materials, used in high-temperature applications such as kilns and furnaces

“The firebrick lining in the kiln helped to distribute heat evenly during the firing process.”

2. noun

a brick or block of fire-resistant material, used for insulating or protecting against heat

“The firebrick around the engine helped to keep it cool during the long journey.”