ecosphere

  1. Noun.  The portion of the atmosphere from sea-level to about 4000 meters in which it is possible to breathe without technological assistance.
  2. Noun.  the biosphere.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.