paedogenesis
noun
                                                                                                                            
                                                            pae·do·gen·e·sis
                    
                                                                                                              
                                                                                                                                  ˌpē-dō-ˈje-nə-səs 
                                                      
                                                          
            
            variants  
 or less commonly pedogenesis
        
    
                                
              
          
                                                      : reproduction by young or larval animals : neoteny                                      
                
                    
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  Merriam-Webster unabridged




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