self-acting
adjective
                                                                                                                            
                                                            self-act·ing
                    
                                                                                                              
                                                                                                                                  ˌself-ˈak-tiŋ  
                                                      
                                                          
            
                                
              
          
                                                      : acting or capable of acting of or by itself : automatic                                      
                
                    
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  Merriam-Webster unabridged




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