ec·o·sphere

[ek-oh-sfeer, ee-koh-]
noun
1.
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).
2.
Ecology. the planetary ecosystem, including all the earth's living organisms and their physical environment; biosphere.

Origin:
1950–55; eco- + sphere

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
ecosphere (ˈiːkəʊˌsfɪə, ˈɛkəʊ-) [Click for IPA pronunciation guide]
 
n
the planetary ecosystem, consisting of all living organisms and their environment

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Ecosphere is always a great word to know.
So is flibbertigibbet. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a chattering or flighty, light-headed person.
American Heritage
Science Dictionary
ecosphere   (ē'kō-sfîr')  Pronunciation Key 
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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Example sentences
The term may be applied to a unit as large as the entire ecosphere.
Anything which fails to fit into the ecosphere is a threat to its finely balanced cycles.
The acidification of the oceans may be a bigger danger to the ecosphere than a few degrees of additional warmth.
It is the finiteness of the ecosphere in all its dimensions to which biologists draw attention.
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