distolingual
adjective
                                                                                                                            
                                                            dis·to·lin·gual
                    
                                                                                                              
                                                                                                                                  -ˈliŋ-g(yə-)wəl  
                                                      
                                                          
            
                                
              
          
                                                      : relating to or situated on the distal and lingual surfaces of a tooth                                      
              
                             
the distolingual cusp
                         
                
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  Merriam-Webster unabridged




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