球きゅう面めん鏡きょう

noun

spherical mirror

Technical term in optics for a mirror with a curved reflecting surface that is part of a sphere.

• 球きゅう面めん鏡きょうは凹おう面めん鏡きょうと凸とつ面めん鏡きょうに分わけられる。

  Spherical mirrors are divided into concave and convex mirrors.