Category:Triphthong

Triph"thong, n. Etym: [pref. tri- + -phthong, as in diphthong: cf. F. Triphthonque.] (orthoëpy)

Defn: a combination of three vowel sounds in a single syllable, Forming a simple or compound sound; also, a union of three vowel Characters, representing together a single sound; a trigraph; as, Eye, -ieu in adieu, -eau in beau, are examples of triphthongs.