biosphere

The biosphere is defined as the area of the planet where organisms live, including the ground and the air.

(noun)

An example of the biosphere is where live occurs on, above and below the surface of Earth.

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See biosphere in Webster's New World College Dictionary

noun

  1. the zone of planet earth where life naturally occurs, extending from the deep crust to the lower atmosphere
  2. the living organisms of the earth

Origin: bio- + sphere

See biosphere in American Heritage Dictionary 4

noun
  1. The part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life.
  2. The living organisms and their environment composing the biosphere.

Related Forms:

  • biˌo·spherˈic (-sfîrˈĭk, -sfĕrˈ-) adjective

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