Biosphere Definition
bīə-sfîr
noun
The zone of planet earth where life naturally occurs, extending from the deep crust to the lower atmosphere.
Webster's New World
The living organisms of the earth.
Webster's New World
The part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life.
American Heritage Medicine
The living organisms and their environment composing the biosphere.
American Heritage Medicine
The part of the Earth and its atmosphere capable of supporting life.
Wiktionary
Other Word Forms of Biosphere
Noun
Singular:
biosphere
Plural:
biospheresOrigin of Biosphere
bio- + -sphere
From Wiktionary
Biosphere Is Also Mentioned In
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