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geo-

1.
a combining form meaning “the earth,” used in the formation of compound words:
geochemistry.
Origin of geo-
< Greek geō-, combining form of the earth

Geo.

1.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for geo

geo

/ˈdʒiːəʊ/
noun (pl) geos, gios
1.
(esp in Shetland) a small fjord or gully
Word Origin
C18: from Old Norse gjā ravine; related to Old English gionian to yawn

geo-

combining form
1.
indicating earth: geomorphology
Word Origin
from Greek, from earth
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 geo

geo-

word-forming element meaning "earth," ultimately from Greek geo-, comb. form of ge "earth" (see Gaia).

Online Etymology Dictionary, © 2010 Douglas Harper
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geo in Medicine

geo- or ge-
pref.
Earth: geophagia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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geo in Science
geo- or ge-  
A prefix that means "earth," as in geochemistry, the study of the Earth's chemistry.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Related Abbreviations for geo

GEO

1.
genetically engineered organism
2.
geosynchronous earth orbit
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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