ribozyme
noun
                                                                                                                            
                                                            ri·bo·zyme
                    
                                                                                                              
                                                                                                                                  ˈrī-bə-ˌzīm  
                                                      
                                                          
            
                                
              
          
                                                      : a molecule of RNA that functions as an enzyme (as by catalyzing the cleavage of other RNA molecules)                                      
                
                    
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  Merriam-Webster unabridged




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