firebrick
noun [ C ] UK uk/ˈfaɪə.brɪk/ us/ˈfaɪr.brɪk/
耐火砖（一种耐高温砖，用于需承受高温的建筑结构，如烟囱、火炉）
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