Meaning of “firebrick” in the English Dictionary

british dictionary

"firebrick" in British English

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firebricknoun [ C ]

uk /ˈfaɪə.brɪk/ us /ˈfaɪr.brɪk/ UK

a brick that is not damaged by high temperatures and is therefore used when building things, such as chimneys and fireplaces, that will reach high temperatures

(Definition of “firebrick” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)