- a composite vowel sound during the articulation of which the vocal organs move from one position through a second, ending in a third
- a trigraph representing a composite vowel sound such as this
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WordReference Random House Unabridged Dictionary of American English © 2016
triph•thong (trif′thông, -thong, trip′-),USA pronunciation n.
Collins Concise English Dictionary © HarperCollins Publishers::
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