monophthong

[ mon-uh f-thawng, -thong ]
/ ˈmɒn əfˌθɔŋ, -ˌθɒŋ /

noun Phonetics.

a vowel retaining the same quality throughout its duration.

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weal
Compare diphthong.

Origin of monophthong

1610–20; < Greek monóphthongos equivalent to mono- mono- + phthóngos sound

OTHER WORDS FROM monophthong

mon·oph·thon·gal [mon-uh f-thawng-guh l, -thong-] /ˈmɒn əfˌθɔŋ gəl, -ˌθɒŋ-/, adjective
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British Dictionary definitions for monophthong

monophthong
/ (ˈmɒnəfˌθɒŋ) /

noun

a simple or pure vowel

Derived forms of monophthong

monophthongal (ˌmɒnəfˈθɒŋɡəl), adjective

Word Origin for monophthong

C17: from Greek monophthongos, from mono- + thongos sound
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012