%phthongal%

v. t. To make into a diphthong; to pronounce as a diphthong. [ 1913 Webster ]

a. Consisting of, or pertaining to, a monophthong. [ 1913 Webster ]

n. A vocalized element or letter. [ 1913 Webster ]

a. [ Gr. &unr_; voice. ] Formed into, or characterized by, voice; vocalized; -- said of all the vowels and the semivowels, also of the vocal or sonant consonants g, d, b, l, r, v, z, etc. [ 1913 Webster ]