tachometer
/tæ'kɔmitə/
Definition
Noun: A tachometer is a measuring instrument used to indicate the rotational speed of a shaft or disk, typically in revolutions per minute (RPM). It is commonly found in vehicles to show the engine's RPM.
Usage
The word tachometer is used to refer to the specific gauge or device that measures rotational speed. * The mechanic checked the tachometer to see if the engine was idling correctly. * A high reading on the tachometer can indicate the engine is working very hard.
Advanced Usage
- Digital/Analog Tachometer: Specifies the type of display.
- Tachometer Reading/Needle: Refers to the specific measurement or indicator.
Variants and Related Words
- Tach (n.): A common informal abbreviation for tachometer.
- Tachometry (n.): The measurement of rotational speed.
Synonyms
- Rev counter (n.): A common synonym, especially in British English.
- RPM gauge (n.): A descriptive term for the instrument.
Related Terms and Contexts
- Speedometer (n.): An instrument that measures the linear speed of a vehicle (e.g., miles per hour). It is often paired with a tachometer on a dashboard but measures a different quantity.
- Odometer (n.): An instrument that measures the total distance traveled by a vehicle.
Noun
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measuring instrument for indicating speed of rotation
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