monophthong

noun mon·oph·thong \ˈmä-nə(f)-ˌthȯŋ\

Definition of MONOPHTHONG

: a vowel sound that throughout its duration has a single constant articulatory position

— mon·oph·thon·gal \ˌmä-nə(f)-ˈthȯŋ-(g)əl\ adjective

Late Greek monophthongos single vowel, from Greek mon- + phthongos sound

First Known Use: 1616

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