円えん唇しん

noun, noun which may take the genitive case particle 'no'

lip rounding; rounded

Linguistics term referring to the rounding of the lips during articulation, especially for vowels. Often used in phrases like 円唇母音 (rounded vowel).

• 「う」は円えん唇しん母ぼ音いんの一ひとつです。

  'U' is one of the rounded vowels.

• 円えん唇しんの度ど合あいは言げん語ごによって異ことなる。

  The degree of lip rounding differs from language to language.