正せい円えん窓そう

noun

round window; fenestra rotunda

Anatomical term for the membrane-covered opening between the middle ear and the cochlea. Used in medical and biological contexts.

• 正せい円えん窓そうは内ない耳じへの振しん動どう伝でん達たつに関かん与よする。

  The round window is involved in transmitting vibrations to the inner ear.