surface-active
adjective
                                                                                                                            
                                                            sur·face-active
                    
                                                                                                              
                                                                                                                                  ˈsər-fəs-ˌak-tiv 
                                                      
                                                          
            
                                
              
          
                                                      : altering the properties and especially lowering the tension at the surface of contact between phases                                      
              
                             
soaps and wetting agents are typical surface-active substances
                         
                
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  Merriam-Webster unabridged




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