speedometer
speed.om.e.ter \spi-'da:m-*t-*r\ n 1: an instrument for indicating speed : TACHOMETER 2: an instrument for indicating distance traversed as well as speed of trav el; also : ODOMETER
Webster's English Dictionaryspeed.om.e.ter \spi-'da:m-*t-*r\ n 1: an instrument for indicating speed : TACHOMETER 2: an instrument for indicating distance traversed as well as speed of trav el; also : ODOMETER