oscillator

US /ˈɑː.sɪ.leɪ.tər/
UK /ˈɑː.sɪ.leɪ.tər/
"oscillator" picture
1.

an electronic device that produces a continuous, oscillating electrical signal without any input signal

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The radio transmitter uses a crystal oscillator to generate its carrier frequency.
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The engineer adjusted the oscillator to fine-tune the circuit's output.
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generatorvibrator
2.

a device that produces oscillations or vibrations

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The mechanical oscillator in the clock ensures precise timekeeping.
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A simple pendulum acts as a mechanical oscillator.
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oscillation