Foucault's pendulum

Etymology
From the name of the French physicist.

Noun

 * 1) A pendulum on a long wire, free to move in any direction; the plane of its motion appears to turn (clockwise in the Northern Hemisphere) as the world turns beneath it.

Translations

 * Chinese:
 * Mandarin:
 * Czech: Foucaultovo kyvadlo
 * Estonian: Foucault' pendel
 * Finnish: Foucaultin heiluri
 * French:
 * Georgian: ფუკოს ქანქარა
 * German: Foucaultsches Pendel
 * Hungarian: Foucault-inga
 * Italian: pendolo di Foucault
 * Japanese: フーコーの振り子
 * Polish: Wahadło Foucaulta
 * Russian: ма́ятник Фуко́
 * Ukrainian: ма́ятник Фуко́