diphthongal, a.
(dɪfˈθɒŋgəl)
[f. diphthong n. + -al1.]
Of or belonging to a diphthong; of the nature of a diphthong.
| 1748 Phil. Trans. XLV. 403 That 7 vocal Notes or Vowels..struck, as one may say, in diphthongal or triphthongal Chords with each other, may well enough account for the Sounds of our Language. 1806 M. Smart in Monthly Mag. XXI. 14 So easily does r slide into vowel or dipthongal sounds. 1867 A. J. Ellis E.E. Pronunc. i. iii. 116 Ben Jonson..entirely ignores the diphthongal character of long i. 1888 Sweet Eng. Sounds 248 A diphthongal pronunciation of the..words. |
Hence diphˈthongally adv.
| 1846 Worcester cites Wylie. Mod. The question whether long i was already pronounced diphthongally in 1500. |