retroversion
noun
                                                                                                                            
                                                            ret·ro·ver·sion
                    
                                                                                                              
                                                                                                                                  ˌre-trō-ˈvər-zhən  
                                                                                                                              
             also  -shən
                                                      
                                                          1
                    
                                          
              
          
                                                      : the bending backward of the uterus and cervix                                      
                
                    
2
                    
                                          
              
          
                                                      : the act or process of turning back or regressing                                      
                
                    
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  Merriam-Webster unabridged




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