melanotropic
adjective
                                                                                                                            
                                                            me·la·no·tro·pic
                    
                                                                                                              
                                                                                                                                  mə-ˌlan-ə-ˈtrō-pik  ˌmel-ə-nō-
                                                                                                                                  ˌmel-ə-nō-  
                                                                                                                              
            -ˈträp-ik
                                                      
                                                          
            variants  
 also melanotrophic    
        
    
                                
              
          
                                                      : promoting the formation and deposit of melanin                                      
              
                             
melanotropic activity
                                       melanotropic agents
                         
                
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  Merriam-Webster unabridged




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