From Longman Dictionary of Contemporary Englishmileometermile‧om‧e‧ter, milometer /maɪˈlɒmɪtə $ -ˈlɑːmɪtər/ noun [countable] British English  TTCan instrument in a car that shows how many miles it has travelled SYN odometer American English
                                                    
                                                Examples from the Corpus
mileometer• I have also fitted 750 x 16 tyres - how does this affect calibration of the speedo and mileometer. 
