euthenics
noun
                                                                                                                            
                                                            eu·then·ics
                    
                                                                                                              
                                                                                                                                  yü-ˈthe-niks  
                                                      
                                                          
            
            
               plural in form but singular or plural in construction             
        
    
                                
              
          
                                                      : a science that deals with development of human well-being by improvement of living conditions                                      
                
                    
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  Merriam-Webster unabridged




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