tachometer

[ ta-kom-i-ter, tuh- ]

noun

1. any of various instruments for measuring or indicating velocity or speed, as of a machine, a river, or the blood.
2. an instrument measuring revolutions per minute, as of an engine.

tachometer

/ ˌtækəˈmɛtrɪk; tæˈkɒmɪtə /

noun

1. any device for measuring speed, esp the rate of revolution of a shaft. Tachometers (rev counters) are often fitted to cars to indicate the number of revolutions per minute of the engine

Derived Forms

• taˈchometry, noun
• ˌtachoˈmetrically, adverb
• tachometric, adjective

Other Words From

• tach·o·met·ri·cal·ly [tak-, uh, -, me, -trik-lee], adverb
• ta·chome·try noun

Word History and Origins

Origin of tachometer¹

First recorded in 1800–10; tacho- + -meter

Example Sentences

Damaged and beyond use was the tachometer, which was to have registered the vessel’s speed of descent.

From New York Times

Enhanced: tachometer even further to the left, speedometer even further to the right, and a wide customizable center.

From The Verge

There are three customizable views that completely reconfigure the display: Normal: tachometer on the left, speedometer on the right, and customizable center for nav, current audio track, or cruise control info.

From The Verge

Sport: tachometer front and center with your digital speed slightly to the upper right.

From The Verge

Upshift with the tachometer at 2,000 to 2,500 rpm, not 3,000, Toyota advises.

From Los Angeles Times