proxemics
noun
                                                                                                                            
                                                            prox·e·mics
                    
                                                                                                              
                                                                                                                                  präk-ˈsē-miks  
                                                      
                                                          
            
            
               plural in form but singular or plural in construction             
        
    
                                
              
          
                                                      : the study of the nature, degree, and effect of the spatial separation individuals naturally maintain (as in various social and interpersonal situations) and of how this separation relates to environmental and cultural factors                                      
                
                    
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  Merriam-Webster unabridged




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