monophthong

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mon·oph·thong

M0397000 (mŏn′əf-thông′, -thŏng′)n.1. A single vowel articulated without change in quality throughout the course of a syllable, as the vowel of English bed.2. Two written vowels representing a single sound, as oa in boat.
[Late Greek monophthongos : Greek mono-, mono- + Greek phthongos, sound.]
mon′oph·thon′gal (-thông′gəl, -thŏng′-) adj.

monophthong

(ˈmɒnəfˌθɒŋ) n (Phonetics & Phonology) a simple or pure vowel[C17: from Greek monophthongos, from mono- + thongos sound] monophthongal adj

mon•oph•thong

(ˈmɒn əfˌθɔŋ, -ˌθɒŋ)

n. a vowel sound retaining the same quality throughout its duration. Compare diphthong (def. 1). [1610–20; < Greek monóphthongos=mono- mono- + phthóngos sound] mon′oph•thon`gal (-gəl) adj.
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