Dictionary.com

geo-

Save This Word!

a combining form meaning “the earth,” used in the formation of compound words: geochemistry.
QUIZ
QUIZ YOURSELF ON AFFECT VS. EFFECT!
In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.
Meet Grammar CoachWrite or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing
Meet Grammar CoachImprove Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of geo-

<Greek geō-, combining form of the earth

Other definitions for geo- (2 of 2)

Geo.

abbreviation
George.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use geo- in a sentence

British Dictionary definitions for geo- (1 of 2)

geo

gio

/ (ˈdʒiːəʊ) /

noun plural geos or gios
(esp in Shetland) a small fjord or gully

Word Origin for geo

C18: from Old Norse gjā ravine; related to Old English gionian to yawn

British Dictionary definitions for geo- (2 of 2)

geo-

combining form
indicating earthgeomorphology

Word Origin for geo-

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

Medical definitions for geo-

geo-

pref.
Earth:geophagia.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for geo-

geo-
ge-

A prefix that means “earth,” as in geochemistry, the study of the Earth's chemistry.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK