tachograph

[ tak-uh-graf, -grahf ]
/ ˈtæk əˌgræf, -ˌgrɑf /

noun

a recording tachometer.

Origin of tachograph

British Dictionary definitions for tachograph

tachograph
/ (ˈtækəˌɡrɑːf, -ˌɡræf) /

noun

a tachometer that produces a graphical record (tachogram) of its readings, esp a device for recording the speed of and distance covered by a heavy goods vehicle Often shortened to: tacho