Definition from Wiktionary, the free dictionary
From Middle English etimologie, from Old French ethimologie, from Latin etymologia, from Ancient Greek ἐτυμολογία (etumologia), from ἔτυμον (etumon, “true sense”) and -λογία (-logia, “study of”) (from λόγος (logos)).
- (RP) enPR: ĕt"ə-mŏl'ə-jē, IPA: /ˌɛt.ɪˈmɒl.ə.dʒi/, X-SAMPA: /%Et.I"mQl.@.dZi/
- (GenAm) enPR: ĕt"ə-mŏl'ə-jē, IPA: /ˌɛtəˈmɑlədʒi/, X-SAMPA: /%Et@"mAl@dZi/
etymology (plural etymologies)
- (uncountable) The study of the historical development of languages, particularly as manifested in individual words.
- (countable) An account of the origin and historical development of a word.
Usage notes 
- Not to be confused with entomology (“the study of insects”) or etiology (“the study of causes or origins”).
Derived terms 
Related terms 
study of the historical development of languages, particularly of individual words
account of the origin and historical development of a word
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