Odometer

An odometer or odograph is an instrument used for measuring the distance traveled by a vehicle, such as a bicycle or car. The device may be electronic, mechanical, or a combination of the two (electromechanical). The noun derives from ancient Greek ὁδόμετρον, hodómetron, from ὁδός, hodós and μέτρον, métron ('measure').

Early forms of the odometer existed in the ancient Greco-Roman world as well as in ancient China.
In countries using Imperial units or US customary units it is sometimes called a mileometer or milometer, the former name especially being prevalent in the United Kingdom and among members of the Commonwealth.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

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