from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The study of causes or origins.
  • n. The branch of medicine that deals with the causes or origins of disease.
  • n. Assignment of a cause, an origin, or a reason for something.
  • n. The cause or origin of a disease or disorder as determined by medical diagnosis.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Alternative spelling of aetiology.

from the GNU version of the Collaborative International Dictionary of English

  • n. The science of causes. Same as �tiology.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the cause of a disease
  • n. the philosophical study of causation


Late Latin aetiologia, from Greek aitiologiā : aitiā, cause + -logiā, -logy.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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