Category:Diphthong

Diph"thong (115, 277), n. Etym: [L. diphthongus, Gr. diphthongue.] (Orthoëpy) (a) A coalition or union of two vowel sounds pronounced in one syllable; as, ou in out, oi in noise; -- called a proper diphthong. (b) A vowel digraph; a union of two vowels in the same syllable, only one of them being sounded; as, ai in rain, eo in people; -- called an improper diphthong.

diphthong Diph"thong, v. t.

Defn: To form or pronounce as a diphthong; diphthongize. [R.]