triphthong
noun [ C ] phonetics specialized uk/ˈtrɪf.θɒŋ/ /ˈtrɪp.θɒŋ/ us/ˈtrɪf.θɑːŋ/ /ˈtrɪp.θɑːŋ/
三重元音
a vowel sound in which the tongue changes position to produce the sound of three vowels
Compare: diphthongmonophthong
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