Английский разговорный словарь (основной) - diphthong

ˈdɪfθɔŋ n. 1 a speech sound in one syllable in which the articulation begins as for one vowel and moves as for another (as in coin, loud, and side). 2 a a digraph representing the sound of a diphthong or single vowel (as in feat). b a compound vowel character; a ligature (as ó). øødiphthongal adj. [F diphtongue f. LL diphthongus f. Gk diphthoggos (as DI-(1), phthoggos voice)]