FIREBRICK
Meaning of FIREBRICK in English
fire ‧ brick /ˈfaɪəˌbrɪk $ ˈfaɪr-/ BrE AmE noun [countable]
a brick that is not damaged by heat, used in chimneys
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012