Foucault pendulum

noun
Fou·​cault pendulum | \ ˌfü-ˈkō- How to pronounce Foucault pendulum (audio) \

Definition of Foucault pendulum

: a freely swinging pendulum that consists of a heavy weight hung by a long wire and that swings in a constant direction which appears to change showing that the earth rotates

First Known Use of Foucault pendulum

1931, in the meaning defined above

History and Etymology for Foucault pendulum

J. B. L. Foucault

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The first known use of Foucault pendulum was in 1931

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Cite this Entry

“Foucault pendulum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Foucault%20pendulum. Accessed 28 Sep. 2020.

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