韵头[ yùn tóu ]

⒈ 介音。是介于主要元音与声母之间的高元音。英head vowel, any of the three vowels “i”,“u” and “ü”in certain compound vowels, as “i” in “iang”;

⒈ 又称介音。某些韵母的组成部分，是介于声母和韵腹之间的高元音。参见“韵母”。