tach
Definition
- Noun:
- A device for measuring speed of rotation: A "tach" is an instrument that indicates the rotational speed of an engine or other rotating object, typically measured in revolutions per minute (RPM). It is a short form of "tachometer."
Usage
- The word "tach" is an informal, clipped form of "tachometer." It is primarily used in technical, automotive, or mechanical contexts. It functions as a countable noun.
Examples
- Noun:
- Keep an eye on the tach to avoid over-revving the engine.
- The mechanic connected a digital tach to diagnose the motor's performance.
Advanced Usage
- "To redline the tach": To operate an engine at or near its maximum safe RPM, as indicated on the tachometer's red zone.
- He redlined the tach during the race, risking engine damage.
Variants and Related Words
- Tachometer (n): The full, formal term for the measuring instrument.
- The car's dashboard includes a speedometer and a tachometer.
Synonyms
- Rev counter (n): Another common term for a tachometer, especially in British English.
- RPM gauge (n): A descriptive synonym emphasizing the unit of measurement.
Related Phrases
- Tach reading: The specific RPM value shown by the instrument at a given moment.
- The tach reading was steady at 3000 RPM while cruising.
Noun
-
measuring instrument for indicating speed of rotation
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