promoter
noun
                                                                                                                            
                                                            pro·mot·er
                    
                                                                                                              
                                                                                                                                  prə-ˈmō-tər  
                                                      
                                                          
            1
                    
                                          
              
          
                                                      : one that promotes                                      
                
                                
            especially                
          
                                                      : one who assumes the financial responsibilities of a sporting event (such as a boxing match) including contracting with the principals, renting the site, and collecting gate receipts                                      
            
            2
                    
                                obsolete 
                                  
              
          
                                                      : prosecutor                                      
                
                    
3
                    
                                          
              
          
                                                      : a substance that in very small amounts is able to increase the activity of a catalyst                                      
                
                    
4
                    
                                          
              
          
                                                      : a binding site in a DNA chain at which RNA polymerase binds to initiate transcription of messenger RNA by one or more nearby structural genes                                      
                
                    
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  Merriam-Webster unabridged




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