biosphere

biosphere definition - medical

bi·o·sphere (bīˈə-sfîrˌ)

noun
  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.

Related Forms:

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

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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