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」は円唇母音の一つです。
'U' is one of the rounded vowels.
円唇の度合いは言語によって異なる。
The degree of lip rounding differs from language to language.