e·ti·ol·o·gy
noun/ˌiːtiˈɒlədʒi/
/ˌiːtiˈɑːlədʒi/
(North American English) (British English aetiology)
(plural etiologies)
(medical)- [uncountable, countable] the cause of a disease or medical condition
病原；病因 - [uncountable] the scientific study of the causes of disease
病因学；病理学