noun, plural ae·ti·ol·o·gies.

Nearby words

  1. aethereal,
  2. aetheric,
  3. aethon,
  4. aetio-,
  5. aetiological,
  6. aetna,
  7. aetolia,
  8. aetolus,
  9. aew,
  10. aeëtes

Related formsae·ti·o·log·ic [ee-tee-uh-loj-ik] /ˌi ti əˈlɒdʒ ɪk/, ae·ti·o·log·i·cal, adjectiveae·ti·o·log·i·cal·ly, adverbae·ti·ol·o·gist, noun


or ae·ti·ol·o·gy


noun, plural e·ti·ol·o·gies.

  1. the study of the causes of diseases.
  2. the cause or origin of a disease.
the study of causation.
any study of causes, causation, or causality, as in philosophy, biology, or physics.

Origin of etiology

1545–55; < Latin aetiologia < Greek aitiología determining the cause of something, equivalent to aití(a) cause + -o- -o- + -logia -logy

Related formse·ti·ol·o·gist, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for aetiology

  • The aetiology of the disease is not yet known, and there are very many theories offered to explain it.

  • Therefore it is perhaps possible to put the temerity of the Dogmatics to shame in aetiology by these Tropes.

  • The study of aetiology of disease is in fact only a particular case of that of aetiology in general.

    Disease in Plants|H. Marshall Ward

British Dictionary definitions for aetiology



noun plural -gies

the philosophy or study of causation
the study of the causes of diseases
the cause of a disease
Derived Formsaetiologist or etiologist, noun

Word Origin for aetiology

C16: from Late Latin aetologia, from Greek aitiologia, from aitia cause


noun plural -gies

a variant spelling of aetiology
Derived Formsetiological (ˌiːtɪəˈlɒdʒɪkəl), adjectiveetiologically, adverbetiologist, 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

Word Origin and History for aetiology



"science of causes or causation," 1550s, from Late Latin aetiologia, from Greek aitiologia "statement of cause," from aitia "cause" + -logia "a speaking" (see -logy). Related: Etiologic; etiological.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for aetiology



The science and study of the causes or origins of disease.
The cause or origin of a disease or disorder as determined by medical diagnosis.

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

Science definitions for aetiology



The cause or origin of a disease, condition, or constellation of symptoms or signs, as determined by medical diagnosis or research.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.