TACHOGRAPH
tachograph
(noun) a tachometer that produces a graphical record of its readings; used to record the speed and duration of trips in a motor vehicle
Source: WordNet® 3.1
Etymology
Noun
tachograph (plural tachographs)
A device that records the distance and time traveled by a vehicle (especially a truck or coach), used to check the drivers' working time.
Synonym: tacho
Source: Wiktionary
Tach"o*graph, n. [Gr. speed + -graph.]
Definition: A recording or registering tachometer; also, its autographic
record.
Source: Webster’s Unabridged Dictionary 1913 Edition