ōˈdäməd.ə(r) noun
Etymology: French odomètre, modification of Greek hodometron, hodometros instrument for measuring distance, from hodos way, road + metron measure — more at cede , meter
1. : an instrument attached to a vehicle to measure the distance traversed
some speedometers are equipped with a trip odometer which registers distance traveled up to 999.9 miles — Ernest Venk & William Landon
2. : a wheel used by surveyors that registers the miles and rods traversed