fireback
noun
                                                                                                                            
                                                            fire·back
                    
                                                                                                              
                                                                                                                                  ˈfī(-ə)r-ˌbak  
                                                      
                                                          
            
                                
              
          
                                                      : an often decorated cast-iron plate lining the back wall of a fireplace                                      
                
                    
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  Merriam-Webster unabridged




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