Odometer n. : An instrument attached to the wheel of a vehicle, to measure the distance traversed; also, a wheel used by surveyors, which registers the miles and rods traversed.

Example:
What could have caused my Odometer to stop working?

Taxonomy
odometer, wheel, vehicle, carriage, diameter, circumference, cogs, trip odometer, the distance, measurements, revolution, wooden figure, odometer rollback, Volume 4, odometer fraud, trip meter, gears, strikes.

Defination from the web:
odometer, a trip meter is reset at any point in a journey, making it possible to record the distance travelled in any particular journey or part of a journey. ... The odometer as used in modern systems, where a separate gear controls each digit, was invented in 1847 by ...