monophthong
noun/ˈmɒnəfθɒŋ/, /ˈmɒnəθɒŋ/
/ˈmɑːnəfθɔːŋ/, /ˈmɑːnəθɔːŋ/
(phonetics)- a speech sound that consists of only one vowel sound, for example the /uː/ sound in queue /kjuː/
单元音 Word Originearly 17th cent.: from Greek monophthongos, from monos ‘single’ + phthongos ‘sound’.