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English definition of “pendulum”

pendulum

noun [C]  /ˈpen·dʒə·ləm/ us  
a device consisting of a weight hanging on a rod or cord that moves from one side to the other, esp. one that forms a part of a clock A pendulum is also power or control of an activity that changes from one group to another: In labor-management relations, the pendulum has swung wildly in the direction of the players.
(Definition of pendulum from the Cambridge Academic Content Dictionary © Cambridge University Press)
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