Definition of diphthong noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈdɪfθɒŋ//
; NAmE NAmE//ˈdɪfθɑːŋ//
, NAmE//ˈdɪfθɔːŋ//
; BrE BrE//ˈdɪpθɒŋ//
; NAmE NAmE//ˈdɪpθɑːŋ//
, NAmE//ˈdɪpθɔːŋ//
(phonetics) Phonetics
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a combination of two vowel sounds or vowel letters, for example the sounds // in pipe /paɪp/ or the letters ou in doubt compare monophthong, triphthong Wordfindercluster, consonant, diphthong, elide, intonation, phonetics, pronunciation, stress, tone, voiced See related entries: Phonetics Word Originlate Middle English: from French diphtongue, via late Latin from Greek diphthongos, from di- ‘twice’ + phthongos ‘voice, sound’.
See the Oxford Advanced American Dictionary entry: diphthong