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speedometer

American  
[spee-dom-i-ter, spi-] / spiˈdɒm ɪ tər, spɪ- /

noun

  1. an instrument on an automobile or other vehicle for indicating the rate of travel in miles or kilometers per hour.


speedometer British  
/ spɪˈdɒmɪtə /

noun

  1. a device fitted to a vehicle to measure and display the speed of travel See also mileometer

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

speedometer Scientific  
/ spĭ-dŏmĭ-tər /
  1. An instrument for indicating the speed of a vehicle, typically by measuring the rate of rotation of a wheel or fan whose rate of rotation depends on the speed of the vehicle.

  2. Compare odometer


Etymology

Origin of speedometer

First recorded in 1900–05; speed + -o- + -meter

Explanation

The device in a car that measures how fast you're going is the speedometer. Most speedometers can measure as much as 160 miles per hour — even though it's illegal to drive that fast in the U.S. The traditional speedometer is a dial with a needle that moves to the right as you press on the gas pedal. Sometimes these devices simply display the digital numeric value of your speed, registering 50 and then 48 as the driver begins to slow down. Speedometers began to be a standard feature in automobiles around 1910, just a bit after the word was coined by adding the Greek-derived suffix -meter, or "a measure," to speed.

Keep Reading on Vocabulary.com

Vocabulary lists containing speedometer

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The Speedometer benchmark is meant to simulate what it’s like to use a web app running using various technologies to see how responsive the experience is.

From The Verge • Mar. 7, 2022

Google has said that the latest Chrome update, version M99, is setting records on Apple’s own Speedometer web benchmark and is even faster and more responsive on Macs than Safari.

From The Verge • Mar. 7, 2022

That additional 200 million doses the U.S. secured brings the country’s reserved vaccine dose count to 1.2 billion doses, according to data compiled by the Duke Global Health Innovation Center’s Launch and Scale Speedometer.

From Slate • Feb. 22, 2021

But my 510 was updated with a Speedhut Speedometer, which uses GPS.

From The Wall Street Journal • Aug. 24, 2016

Nowadays he comes zipping up in a This Year's Model of the Kokomobile with Torpedo Body, Fore-Doors and Red Cushions and draws out his Balance so that he can get Extra Tires and a Speedometer.

From Knocking the Neighbors by Ade, George

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