biogeochemical
noun
                                                                                                                            
                                                            bio·geo·chem·i·cal
                    
                                                                                                              
                                                                                                                                  ˌbī-ō-ˌjē-ə-ˈke-mi-kəl  
                                                      
                                                          
            
                                
              
          
                                                      : of or relating to the partitioning and cycling of chemical elements and compounds between the living and nonliving parts of an ecosystem                                      
                
                    
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