- 1. n. A coalition or union of two vowel sounds pronounced in one syllable; as, ou in out, oi in noise; -- called a proper diphthong. Source: opted
- 2. n. A vowel digraph; a union of two vowels in the same syllable, only one of them being sounded; as, ai in rain, eo in people; -- called an improper diphthong. Source: opted
- 3. v. t. To form or pronounce as a diphthong; diphthongize. Source: opted
- 4. n. a vowel sound that starts near the articulatory position for one vowel and moves toward the position for another Source: wordnet
- 5. (a) A coalition or union of two vowel sounds pronounced in one syllable; as, ou in out, oi in noise; -- called a proper diphthong. (b) A vowel digraph; a union of two vowels in the same syllable, only one of them being sounded; as, ai in rain, eo in people; -- called an improper diphthong. To form or pronounce as a diphthong; diphthongize. [R.] Source: webster
- 6. To form or pronounce as a diphthong; diphthongize. [R.] Source: adambom
- 7. n:100 n. a vowel sound that starts near the articulatory position for one vowel and moves toward the position for another Source: ecdict
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diphthong
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