eco-

Origin

a combining form representing ecology in the formation of compounds (ecosystem; ecotype); also with the more general sense “environment,” “nature,” “natural habitat” (ecocide; ecolaw; ecopolitics).

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Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins

World English Dictionary

eco-

—*combining form*
	denoting ecology or ecological: ecocide; ecosphere

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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Etymonline

Word Origin & History

eco-

compounding element abstracted from ecology, ecological; attested from 1969.

American Heritage

Medical Dictionary

eco- pref.
Ecology; ecological: ecosystem.