# polyphthong

> English word · Noun

## Definitions
1. A phoneme that begins with the sound of one vowel or semivowel and transitions through one or more other (semi)vowel sounds.
2. A diaphoneme realized as a multitarget vowel in some but not necessarily all dialects.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/polyphthong