Lithosphere - Dictionary Definition and Overview

Lithosphere :  (noun)

1: the solid part of the earth consisting of the crust and outer mantle [syn: geosphere]

Based on WordNet 2.0

Lithosphere : \Lith"o*sphere\, n. [Litho- _ sphere.] (Phys. Geog.) (a) The solid earth as distinguished from its fluid envelopes, the hydrosphere and atmosphere. (b) The outer part of the solid earth, the portion undergoing change through the gradual transfer of material by volcanic eruption, the circulation of underground water, and the process of erosion and deposition. It is, therefore, regarded as a third mobile envelope comparable with the hydrosphere and atmosphere.

Based on WordNet (r) 2.0 (August 2003)
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