どうこうかつやくきん 瞳孔括約筋 LinksSentence search for 瞳孔括約筋Sentence search for どうこうかつやくきんKanji details for 瞳, 孔, 括, 約 and 筋Edit in JMdict Noun1. sphincter muscle of the pupil; sphincter pupillaeAnatomy Discussions Log in to talk about this word.