フーコーの振ふり子こ

noun

Foucault's pendulum

A physics demonstration device that shows the Earth's rotation. Named after the French physicist Léon Foucault.

• 科か学がく博はく物ぶつ館かんでフーコーの振ふり子こを見みた。

  I saw Foucault's pendulum at the science museum.