n. The atmosphere of the earth as distinguished from that of other planets.
n. One of the concentric, spheroidal shells of which the earth may be conceived to consist.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the solid part of the earth consisting of the crust and outer mantle
Word Usage
"Noosphere (source: wiki): In the original theory of Vernadsky, the noosphere is the third in a succession of phases of development of the Earth, after the geosphere (inanimate matter) and the biosphere (biological life)."