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[ep-i-dee-mee-ol-uh-jee, -dem-ee-] /ˌɛp ɪˌdi miˈɒl ə dʒi, -ˌdɛm i-/
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 of epidemiology
1870-75; epidemi(c) + -o- + -logy
Related forms
[ep-i-dee-mee-uh-loj-i-kuh l, -dem-ee-] /ˌɛp ɪˌdi mi əˈlɒdʒ ɪ kəl, -ˌdɛm i-/ (Show IPA),
epidemiologically, adverb
epidemiologist, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for epidemiological
  • There have been epidemiological studies, which show that people who drink green tea tend to have less chance of developing cancer.
  • Canine prostate carcinoma: epidemiological evidence of an increased risk in castrated dogs.
  • No formal epidemiological study was done because the program that included it was replaced due to political conflicts.
  • The reason for this epidemiological poverty is a matter of speculation.
  • But now, thanks to old-fashioned epidemiological investigation, sprouts have been definitively named the culprit.
  • She has taught statistics and conducted large-scale epidemiological studies.
  • Curiosity is not a behaviour included in current epidemiological models.
  • epidemiological investigations are notoriously tricky and it is possible that the full story will never be known.
  • epidemiological studies of this sort identify correlations.
  • In the intervening period, the epidemiological spike that was predicted did not materialise.
British Dictionary definitions for epidemiological


the branch of medical science concerned with the occurrence, transmission, and control of epidemic diseases
Derived Forms
epidemiological (ˌɛpɪˌdiːmɪəˈlɒdʒɪkəl) adjective
epidemiologically, adverb
epidemiologist, noun
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 epidemiological



"study of epidemics," 1873, from Greek epidemios "epidemic" (see epidemic) + -logy. Related: Epidemiological; epidemiologist.

Online Etymology Dictionary, © 2010 Douglas Harper
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epidemiological in Medicine

epidemiology ep·i·de·mi·ol·o·gy (ěp'ĭ-dē'mē-ŏl'ə-jē, -děm'ē-)
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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epidemiological in Science
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.
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