ge·ol·o·gy

[jee-ol-uh-jee]
noun, plural ge·ol·o·gies.
1.
the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is undergoing.
2.
the study of this science.
3.
the geologic features and processes occurring in a given region on the earth or on a celestial body: the geology of Mars; the geology of eastern Kentucky.

Origin:
1680–90; geo- + -logy

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
geology (dʒɪˈɒlədʒɪ) [Click for IPA pronunciation guide]
 
n
1.  the scientific study of the origin, history, structure, and composition of the earth
2.  the geological features of a district or country
 
geological
 
adj
 
geo'logic
 
adj
 
geo'logically
 
adv
 
ge'ologist
 
n
 
ge'ologer
 
n

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
Geology is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Etymonline
Word Origin & History

geology
1735, Mod.L. geologia "the study of the earth," from ge "earth" + logia, from logos "speech, word, discourse." In M.L., geologia (14c.) meant "study of earthly things," i.e. law, as distinguished from arts and sciences, which concern the works of God.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
geology   (jē-ŏl'ə-jē)  Pronunciation Key 
  1. The scientific study of the origin of the Earth along with its rocks, minerals, land forms, and life forms, and of the processes that have affected them over the course of the Earth's history.

  2. The structure of a specific region of the Earth, including its rocks, soils, mountains, fossils, and other features.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

geology definition


The science devoted to the study of the Earth, particularly the solid Earth and the rocks that compose it.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Example sentences
Coal seams, like oilfields, vary hugely in their geology.
Not to mention that a lot of the more difficult geology work done on the moon
  could not have been done strictly via robots.
The pace doesn't make for scintillating geology lectures or textbooks.
One of the best ways to study a city's geology is to look at outcrops revealed
  during construction projects.
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