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Vocabulary Entry
tachometer
|noun
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N
noun
An instrument for measuring the speed of rotation of an object, typically used in vehicles to measure engine RPM (revolutions per minute).
Example Sentences
"The tachometer indicated that the engine was running at 3000 RPM."
"Many sports cars are equipped with a digital tachometer for precise readings."
"He glanced at the tachometer as he accelerated on the highway."