triphthong


triph·thong

noun \ˈtrif-ˌthŋ, ˈtrip-\

Definition of TRIPHTHONG

1
:  a phonological unit consisting of three successive vocalic sounds in one syllable
2
:  trigraph
triph·thon·gal \trif-ˈthŋ-gəl, trip-, -əl\ adjective

Origin of TRIPHTHONG

tri- + -phthong (as in diphthong)
First Known Use: circa 1599

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