The physical Earth; a term for the solid mass (lithosphere) of the planet, or for the lithosphere, hydrosphere, and atmosphere as a whole: A geosphere is the solid matter of the Earth, as distinct from the seas, plants, animals, and surrounding atmosphere.

Geosphere refers to the soils, sediments, and rock layers of the Earth's crust, both continental and beneath the ocean floors.

Geosphere is also known as "geophysiology", or the study of the interaction among living organisms on the world operating under the hypothesis that the planet itself acts as a single living organism.