noun, plural zoologies.
the science or branch of biology dealing with animals.
a treatise on zoology.
the animal life of a particular region.

1660–70; zoo- + -logy

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World English Dictionary
zoology (zəʊˈɒlədʒɪ, zuː-)
n , pl -gies
1.  the study of animals, including their classification, structure, physiology, and history
2.  the biological characteristics of a particular animal or animal group
3.  the fauna characteristic of a particular region
4.  a book, treatise, etc, dealing with any aspect of the study of animals

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1669, from Mod.L. zoologia, from Gk. zoion "animal" (see zoo) + -logia "study," from logos "word." Zoologist first recorded 1663.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
zoology   (zō-ŏl'ə-jē, z-ŏl'-)  Pronunciation Key 
The scientific study of organisms in the kingdom Animalia, including their growth and structure.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
zoology [(zoh-ol-uh-jee)]

The scientific study and classification of animals. (See Linnean classification.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Such a command would not be news in virtually any other discipline, from agronomy to zoology.
Meet eight extraordinary people who live and work at the frontiers of science-from anthropology to zoology.
We transmute mind and matter into a zoology of spirit.
Sheldon was more than prepared to teach marine zoology.
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