oscillation
US /ˌɑː.səlˈeɪ.ʃən/
UK /ˌɑː.səlˈeɪ.ʃən/
1.
the action of swinging or moving to and fro.
:
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The oscillation of the pendulum was mesmerizing.
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We observed the rapid oscillation of the spring.
2.
variation in magnitude or position around a central point.
:
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The stock market experienced significant oscillation throughout the day.
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The temperature showed a clear oscillation between day and night.