円唇えんしん Noun Noun English jmdict 1 noun (common) (futsuumeishi)nouns which may take the genitive case particle 'no' linguistics rounding of the lips;rounded (e.g. vowel)
非円唇ひえんしん Noun Noun English jmdict 1 nouns which may take the genitive case particle 'no'noun (common) (futsuumeishi) linguistics unrounded