lithospherePronunciation: /ˈlɪθəsfɪə/Definition of lithosphere noun Geology the rigid outer part of the earth, consisting of the crust and upper mantle: the lithosphere comprises a number of plates [mass noun]:continental lithosphere has a lower mean density than oceanic lithosphereDerivatives lithosphericPronunciation: /-ˈsfɛrɪk/ adjective lithosphere in other Oxford dictionaries Definition of lithosphere in the US English dictionary
