ETIOLOGY

etiology, aetiology

(noun) the philosophical study of causation

etiology, aetiology

(noun) the cause of a disease

Source: WordNet® 3.1

Noun

etiology (countable and uncountable, plural etiologies)

American standard spelling of aetiology.

Source: Wiktionary

E`ti*ol"o*gy, n. Etym: [Cf. F. étiologie.]

Definition: The science of causes. Same as tiology.

Source: Webster’s Unabridged Dictionary 1913 Edition