You searched for: “pathometer
pathometer (s) (noun), pathometers (pl)
1. An apparatus for recording a body's electrical impulses: In the story a pathometer, or a lie detector, was used when the thief was interrogated.
2. A device that records the distance traveled by a vehicle: A pathometer indicates, in addition to the stretch of road a car travels, the direction or movement and the altitudes which are attained or descended.
3. An instrument designed to register the incidents of diseases in a specified locality: The mayor thought it would be a good idea to have a pathometer to record the number of incidences of the flu that was suddenly increasing in town.