causality etiology http://purl.bioontology.org/ontology/SNOMEDCT/134198009 https://en.wikipedia.org/wiki/Etiology https://homosaurus.org/terms/etiology https://www.wikidata.org/wiki/Q156318 The study of causation, or origination. More completely, etiology is the study of the causes, origins, or reasons behind the way that things are, or the way they function, or it can refer to the causes themselves. The word is commonly used in medicine (pertaining to causes of disease) and in philosophy, but also in physics, psychology, government, geography, spatial analysis, theology, and biology, in reference to the causes or origins of various phenomena. aetiology ætiology