odometer
noun🔊/əʊˈdɒmɪtə(r)/
🔊/əʊˈdɑːmɪtər/
(North American English) (British English milometer, mileometer)
(also informal the clock US English, British English)
an instrument in a vehicle that measures the number of miles it has travelled 里程表；计程器 
Word Originlate 18th cent.: from French odomètre, from Greek hodos ‘way’ + -meter (see meter).
