Index of English words, starting with "di"

(1) - Diphtheria (n.) A very dangerous contagious disease in which the air passages, and especially the throat, become coated with a false membrane, produced by the solidification of an inflammatory exudation. Cf. Group.

(1) - Diphthong (v. t.) To form or pronounce as a diphthong; diphthongize.
(2) - Diphthong (n.) 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.
(3) - Diphthong (n.) A coalition or union of two vowel sounds pronounced in one syllable; as, ou in out, oi in noise; -- called a proper diphthong.