speedometer

[spee-dom-i-ter, spi-]
noun
an instrument on an automobile or other vehicle for indicating the rate of travel in miles or kilometers per hour.

Origin:
1900–05; speed + -o- + -meter

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
speedometer (spɪˈdɒmɪtə)
 
n
See also mileometer a device fitted to a vehicle to measure and display the speed of travel

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
speedometer   (spĭ-dŏm'ĭ-tər)  Pronunciation Key 
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. Compare odometer.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang Dictionary

speedometer

n. A pattern of lights displayed on a linear set of LEDs (today) or nixie tubes (yesterday, on ancient mainframes). The pattern is shifted left every N times the operating system goes through its main loop. A swiftly moving pattern indicates that the system is mostly idle; the speedometer slows down as the system becomes overloaded. The speedometer on Sun Microsystems hardware bounces back and forth like the eyes on one of the Cylons from the wretched "Battlestar Galactica" TV series.

Historical note: One computer, the GE 600 (later Honeywell 6000) actually had an _analog_ speedometer on the front panel, calibrated in instructions executed per second.
FOLDOC
Computing Dictionary

speedometer definition


A pattern of lights displayed on a linear set of LEDs (today) or nixie tubes (yesterday, on ancient mainframes). The pattern is shifted left every N times the operating system goes through its main loop. A swiftly moving pattern indicates that the system is mostly idle; the speedometer slows down as the system becomes overloaded. The speedometer on Sun Microsystems hardware bounces back and forth like the eyes on one of the Cylons from the wretched "Battlestar Galactica" TV series.
Historical note: One computer, the GE 600 (later Honeywell 6000) actually had an *analog* speedometer on the front panel, calibrated in instructions executed per second.
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Encyclopedia Britannica
Encyclopedia

speedometer

instrument that indicates the speed of a vehicle, usually combined with a device known as an odometer that records the distance traveled.

Learn more about speedometer with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Sure enough, the speedometer shoots up in a satisfactory way.
The speedometer uses the rotation of the wheels to get the speed.
The speedometer is basic, but must be certified for catching speeders.
Remember that gas is in liters, and your speedometer and all road signs are in
  kilometers.
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