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lithosphere (n.)

"crust of the earth, solid part of the earth's surface," 1881, from or modeled on German Lithosphäre (1870s); see litho- "stone" + sphere.

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Definitions of lithosphere from WordNet

lithosphere (n.)
the solid part of the earth consisting of the crust and outer mantle;
Synonyms: geosphere
From wordnet.princeton.edu