| It does look more like a triphthong than a diphthong, but the middle sound is high-central or even high-back. |
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| Some linguists use the terms diphthong and triphthong only in this phonemic sense. |
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| In historical linguistics, vowel breaking, vowel fracture, or diphthongization is the change of a monophthong into a diphthong or triphthong. |
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| The syllable nucleus is usually a vowel, in the form of a monophthong, diphthong, or triphthong, but sometimes is a syllabic consonant. |
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| In the sources from the mid-1920s the diphthong ie and the first component of the triphthong ieu was interpreted as a semivowel. |
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| There was one word with a triphthong in the first syllable and a half-long vowel in the second syllable, spelled with a macron. |
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| There was one word having a long diphthong and one word with a triphthong in the first syllable and a half-long vowel in the second syllable, spelled with a macron. |
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| A vowel sound that glides from one quality to another is called a diphthong, and a vowel sound that glides successively through three qualities is a triphthong. |
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