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Foucault pendulum

Foucault pendulum

noun Fou·cault pendulum \ˌfü-ˈkō-\

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

Origin of FOUCAULT PENDULUM

J. B. L. Foucault
First Known Use: 1931

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March 06, 2015
eolian Hear it
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