The definition of a pendulum is an object that has been mounted to a fixed point that swings freely back and forth under the influence of gravity, or the tendency of trends or situations to shift from one extreme to another.(noun)
See pendulum in Webster's New World College Dictionary
Origin: ModL < neut. of L pendulus: see pendulous
See pendulum in American Heritage Dictionary 4
Origin: New Latin
Origin: , probably from Italian pendolo, pendulous, pendulum
Origin: , from Latin pendulus, hanging; see pendulous.
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