韻頭 [韵头]

Jyutping wan5 tau4
Pinyin yùn tóu

Definitions (CC-CEDICT)
  1. leading vowel of diphthong
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. noun
    onglide, the part of the inlaut which is not the nucleus