尿道括約筋 にょうどうかつやくきん Meanings Noun urethral sphincter Kanji 尿 urine. Read as ニョウ. 道 road. Read as ドウ. 括 tie up. Read as カツ. 約 promise. Read as ヤク. 筋 muscle. Read as キン. Word lists Anatomy Jinuma: Japanese Dictionary · Word lists