Pendulum definition

pĕnjə-ləm, pĕndyə-, pĕndə-
Something that swings back and forth from one course, opinion, or condition to another.

The pendulum of public opinion.

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A body suspended from a fixed support so that it swings freely back and forth under the influence of gravity, commonly used to regulate various devices, especially clocks.
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A weight hung from a fixed point so as to swing freely to and fro under the combined forces of gravity and momentum: often used in regulating the movement of clocks.
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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.

The weights fixed to a pivot point on the end of a chain in a grandfather clock that pivot back and forth to help regulate the clock mechanism is an example of a pendulum.

When popular home furniture styles shift from modern to traditional and back again, this is an example of the pendulum of taste.

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A body suspended from a fixed support so that it swings freely back and forth under the influence of gravity, commonly used to regulate various devices such as clocks.
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A mass hung from a fixed support so that it is able to swing freely under the influence of gravity. Since the motion of pendulums is regular and periodic, they are often used to regulate the action of various devices, especially clocks.
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Other Word Forms

Noun

Singular:
pendulum
Plural:
pendulums

Origin of pendulum

  • New Latin probably from Italian pendolo pendulous, pendulum from Latin pendulus hanging pendulous

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

  • Neuter of Latin pendulus, "hanging".

    From Wiktionary