biogeochemical Syllabification: (bi·o·ge·o·chem·i·cal)Pronunciation: /ˌbīōˌjēōˈkemikəl/Definition of biogeochemical adjective relating to or denoting the cycle in which chemical elements and simple substances are transferred between living systems and the environment. Derivatives biogeochemistPronunciation: /-ˈkemist/ noun biogeochemistryPronunciation: /-ˈkeməstrē/ noun biogeochemical in other Oxford dictionaries Definition of biogeochemical in the British & World English dictionary