Foucault Pendulum Definition

noun
A pendulum consisting of a heavy weight on the end of a long wire hanging from a fixed point, of the kind invented by Jean Foucault to demonstrate that the earth is rotating: although the weight continues to swing within a single plane, its path appears to an observer to shift progressively over time.
Webster's New World
Foucault's pendulum.
Wiktionary

Origin of Foucault Pendulum

  • After Jean Bernard Léon Foucault

    From American Heritage Dictionary of the English Language, 5th Edition

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