diphthong UK /ˈdɪfˌθɒŋ(ɡ)/US /ˈdɪfˌθɔŋ/ noun3 •A complex vowel sound that begins with the sound of one vowel and ends with the sound of another vowel, in the same syllable.In Lang Belta vowels usually appear preceding or following a consonant (see previous examples), and as of now no occurrence of diphthongs or triphthongs has been attested. — 2021 •A diaphoneme realized as a two-target vowel in some but not necessarily all dialects. •(rare) A vowel digraph or ligature.And he might have written the name, also, with the diphthong ae, as well as the single vowel, in the initial syllable, throughout all the preceding forms. — 1854 formsdiphthongs
