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[ek-oh-sfeer, ee-koh-] /ˈɛk oʊˌsfɪər, ˈi koʊ-/
Also called physiological atmosphere. the part of the atmosphere in which it is possible to breathe normally without aid: the portion of the troposphere from sea level to an altitude of about 13,000 feet (4000 meters).
Ecology. the planetary ecosystem, including all the earth's living organisms and their physical environment; biosphere.
Origin of ecosphere
1950-55; eco- + sphere Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for ecosphere
  • Anything which fails to fit into the ecosphere is a threat to its finely balanced cycles.
  • It is the finiteness of the ecosphere in all its dimensions to which biologists draw attention.
  • The acidification of the oceans may be a bigger danger to the ecosphere than a few degrees of additional warmth.
  • The term may be applied to a unit as large as the entire ecosphere.
British Dictionary definitions for ecosphere


/ˈiːkəʊˌsfɪə; ˈɛkəʊ-/
the planetary ecosystem, consisting of all living organisms and their environment
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ecosphere

1953, the region around a star where conditions allow life-bearing planets to exist; see eco- + sphere. Apparently coined by German-born U.S. physician and space medicine pioneer Hubertus Strughold (1898-1986).

Online Etymology Dictionary, © 2010 Douglas Harper
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ecosphere in Science
The regions of the Earth that are capable of supporting life, together with the ecosystems they contain; the biosphere.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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