bioreactor
noun
                                                                                                                            
                                                            bio·re·ac·tor
                    
                                                                                                              
                                                                                                                                  ˌbī-ō-rē-ˈak-tər  
                                                      
                                                          
            
                                
              
          
                                                      : a device or apparatus in which living organisms and especially bacteria synthesize useful substances (such as interferon) or break down harmful ones (as in sewage)                                      
                
                    
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  Merriam-Webster unabridged




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