noun Date: 1888 a diphthong (as \\ȯi\\ in \\ˈnȯiz\\ noise ) composed of a vowel followed by a less sonorous glide
FALLING DIPHTHONG
Meaning of FALLING DIPHTHONG in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012