閉へい殻かく筋きん

noun

adductor muscle (of a bivalve)

Technical term in biology and anatomy, specifically referring to the muscle that closes the shell of bivalve mollusks such as clams and oysters.

• 二に枚まい貝がいの閉へい殻かく筋きんは、貝かい殻がらを閉とじるために使つかわれる。

  The adductor muscle of a bivalve is used to close the shell.