odometer

Noun

odometer (plural odometers)

1. An instrument, usually embedded within the speedometer of a vehicle, that measures the distance the vehicle has traveled since production.
   • When the car was delivered about eight weeks later, it was not the model that had been displayed on the show and it had more miles on the odometer than the car she had been promised.2007 December 14, “"Price Is Right" winner claims new car a wreck”, in Reuters
   • On Sunday, the robot rover advanced another 157 feet (48 meters) as it continued along the rim of a Martian crater, putting Opportunity's total odometer at 25.01 miles (40.25 km), according to NASA's Jet Propulsion Laboratory near Pasadena, California.2014 July 29, Steve Gorman, “NASA's Mars rover sets off-Earth, off-road distance record”, in Reuters
2. A wheel used by surveyors, which registers distance traveled.