Pendulum
/pˈɛndʒələm/
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Definition
(noun) 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.
Sentence Examples
He reached into the case and stopped the pendulum.
The pendulum swung back and forth.
CEFR Practice Quiz
The grandfather clock's ____ swung steadily back and forth, marking each passing second.