bi·o·sphere (b   -sfîr )n. 1. All the regions of the earth and its atmosphere in which living organisms are found or can live. 2. The living organisms and their environment composing the biosphere. bi o·spheric (-sfîr k, -sf r-) adj. |
biosphere
1. that part of the universe in which living organisms are known to exist, comprising the atmosphere, hydrosphere and lithosphere.
2. the sphere of action between an organism and its environment.
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