ep·i·de·mi·ol·o·gy

[ep-i-dee-mee-ol-uh-jee, -dem-ee-]
noun
the branch of medicine dealing with the incidence and prevalence of disease in large populations and with detection of the source and cause of epidemics of infectious disease.

Origin:
1870–75; epidemi(c) + -o- + -logy

ep·i·de·mi·o·log·i·cal [ep-i-dee-mee-uh-loj-i-kuhl, -dem-ee-] , adjective
ep·i·de·mi·o·log·i·cal·ly, adverb
ep·i·de·mi·ol·o·gist, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To Epidemiology
00:10
Epidemiology has a plethora of syllables.
So is floccinaucinihilipilification. Does it mean:
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells.
Collins
World English Dictionary
epidemiology (ˌɛpɪˌdiːmɪˈɒlədʒɪ) [Click for IPA pronunciation guide]
 
n
the branch of medical science concerned with the occurrence, transmission, and control of epidemic diseases
 
epidemiological
 
adj
 
epidemio'logically
 
adv
 
epidemi'ologist
 
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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Etymonline
Word Origin & History

epidemiology
study of epidemics, 1873, from Gk. epidemios epidemic (see epidemic) + -logy. Related: Epidemiological; epidemiologist.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

epidemiology ep·i·de·mi·ol·o·gy (ěp'ĭ-dē'mē-ŏl'ə-jē, -děm'ē-)
n.
The branch of medicine that deals with the study of the causes, distribution, and control of disease in populations.


ep'i·de'mi·ol'o·gist n.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
epidemiology   (ěp'ĭ-dē'mē-ŏl'ə-jē)  Pronunciation Key 
The scientific study of the causes, distribution, and control of disease in populations.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Example sentences
While I must stress that this is mere conjecture, such an explanation fits well
  with current theories of plague epidemiology.
The evidence is not murky for those of us who have studied biology,
  epidemiology, and biostatistics.
The epidemiology suggests a steady increase in prevalence over time, not sudden
  increases at times of changes to the schedule.
The papers systematically misrepresent the epidemiology, immunology, and
  toxicology.
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