Dipetalous

di-pefal-us, a. (Bot.) Having 2 flower- leaves or petals. [Gr. dis und petal on, leaf.] Diphtheria, dif or dip-the'rY-a, n. (Med.) A virulent zymotic disease, in which the mucous membrane, esp. of the throat and air pa ages, becomes coated With a false membrane. [Gr. diphthera, leather (the membrane).] — Diphtheric, -ther'ik, -therific, a. Pert, to, etc. Diphthong, dif or diphthong, n. (Orthoepy.) A union of 2 vowel sounds pronounced in one syllable, as, ou in out, — called a proper diphthong union of two vowels in the same syllable, only one of them being sounded, as, in rain, —called an improper diphthong. [OF. diphthongue, Gr. diphthong gos, with 2 sounds, fr. dis and phthonggos, sound.] — Diphthongal, -thon'gal, a. Pert, to, or consisting of etc. Diphyllous, dif 11-us or di-flKus, a. (Bot.) Having 2 leaves, as a calyx, etc. [Gr. dis and phullon, leaf.]