odometer

/oʊˈdɑːmɪtər/
noun
  1. An instrument in a vehicle that measures the total distance it has traveled.
    • The car's odometer showed 50,000 miles after the road trip.
    • When buying a used car, check the odometer to see how much it has been driven.
    • His bicycle odometer broke, so he used a phone app to track distance.
Synonyms