milometer
noun🔊/maɪˈlɒmɪtə(r)/
🔊/maɪˈlɑːmɪtər/
(also mileometer)
(both British English) (North American English odometer)
(also informal the clock British and North American English)
an instrument in a vehicle that measures the number of miles it has travelled 里程表；计程器 
