Triphthong
VOWEL SOUND INVOLVING MOTION THROUGH 3 VOWEL QUALITIES
Tripthong; Triphthongs
In phonetics, a triphthong (, ) (from Greek τρίφθογγος, "triphthongos", literally "with three sounds," or "with three tones") is a monosyllabic vowel combination involving a quick but smooth movement of the articulator from one vowel quality to another that passes over a third. While "pure" vowels, or monophthongs, are said to have one target articulator position, diphthongs have two and triphthongs three.