名詞 etiology:

1. the cause of a disease
   同義詞：aetiology
2. the philosophical study of causation
   同義詞：aetiology

etiology 也作 ae.ti.ol.o.gy

n.（名詞）
【復數(shù)】 e.ti.ol.o.gies

The study of causes or origins.
原因論：對起因或起源的研究
The branch of medicine that deals with the causes or origins of disease.
病原學：醫(yī)學中涉及各種疾病的病因或病原的分支科學

Assignment of a cause, an origin, or a reason for something.
病原的說明：對某起因、起源或原因的陳述
The cause or origin of a disease or disorder as determined by medical diagnosis.
病原，病因：醫(yī)學診斷確定的疾病或身體失調的起因或起源

來源：
Late Latin aetiologia
后期拉丁語 aetiologia
from Greek aitiologia
源自 希臘語 aitiologia
aitia [cause]
aitia [原因]
-logia [-logy]
-logia [前綴，表.…學，…論.]

【引伸】
e.tiolog.ic
e.tiolog.ically
adv.（副詞）
e.tiol.ogist
n.（名詞）