odometer

noun

Etymology: From French odomètre, from Ancient Greek ὁδός (hodós, “road, path, way”) + μέτρον (métron, “measure”), equivalent to odo- + -meter.

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.”

   “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.”

2. A wheel used by surveyors, which registers distance traveled.