括かつ約やく筋きんTop 50000MeaningsNoun1. sphincter (muscle); constrictorKanji used括tie a loop around約promise筋musclePitch accentかつやくきんかつやくきんUsed in vocabulary肛こう門もん括かつ約やく筋きんanal sphincterNoun膀ぼう胱こう括かつ約やく筋きんsphincter muscle of urinary bladderNoun瞳どう孔こう括かつ約やく筋きんsphincter muscle of the pupil; sphincter pupillaeNoun尿にょう道どう括かつ約やく筋きんurethral sphincterNoun内ない肛こう門もん括かつ約やく筋きんinternal anal sphincter (muscle)Noun