括約筋

Reading

Kana: かつやくきん

Romaji: katsuyakukin

Definition

adj-na

noun

1

sphincter; sphincter muscle; constrictor

Kanji

括

Readings: カツ、 くく.る

Meanings: fasten, tie up, arrest, constrict

約

Readings: ヤク、 つづ.まる、 つづ.める、 つづま.やか

Meanings: promise, approximately, shrink

筋

Readings: キン、 すじ

Meanings: muscle, sinew, tendon, fiber, plot, plan, descent