bimodal
adjective
                                                                                                                            
                                                            bi·mod·al
                    
                                                                                                              
                                                                                                                                  (ˌ)bī-ˈmō-dᵊl 
                                                      
                                                          
            
                                
              
          
                                                      : having or relating to two modes                                      
                
                                
            especially                
          
                                                      : having or occurring with two statistical modes                                      
            
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  Merriam-Webster unabridged




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