D defs.my
Entry 1 sense Webster, 1913

Semivowel

· Sem·i·vow·el · IPA
01 n. A sound intermediate between a vowel and a consonant, or partaking of the nature of both, as in the English w and y.
  1. 1.
    A sound intermediate between a vowel and a consonant, or partaking of the nature of both, as in the English w and y.(Phon.)