the study of the causes of diseases.
the cause or origin of a disease.

the study of causation.
any study of causes, causation, or causality, as in philosophy, biology, or physics.
Historical Examples

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

The aetiology of the disease is not yet known, and there are very many theories offered to explain it.
Essays In Pastoral Medicine Austin Malley

Therefore it is perhaps possible to put the temerity of the Dogmatics to shame in aetiology by these Tropes.
Sextus Empiricus and Greek Scepticism Mary Mills Patrick

noun (pl) -gies
the philosophy or study of causation
the study of the causes of diseases
the cause of a disease
noun (pl) -gies
a variant spelling of 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.

etiology e·ti·ol·o·gy or ae·ti·ol·o·gy (ē’tē-ŏl’ə-jē)

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 cause or origin of a disease, condition, or constellation of symptoms or signs, as determined by medical diagnosis or research.


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