speedometer


speed·om·e·ter

noun \spi-ˈdä-mə-tər\

: an instrument in a car, truck, etc., that indicates how fast the vehicle is going

Full Definition of SPEEDOMETER

1
:  an instrument for indicating speed :  tachometer
2
:  an instrument for indicating distance traversed as well as speed of travel; also :  odometer

First Known Use of SPEEDOMETER

1903

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