1) Graph 2) Graphical record 
Record made by a tachometer. ... Origin: G. Tachos, speed, + gramma, mark ... (05 Mar 2000) ... 
(tak´o-gram) the graphic record produced by tachography.
Type: Term Pronunciation: tak′ō-gram Definitions: 1. Record made by a tachometer.
[n] - a graphical record of speed and distance produced by a tachograph
tachogram 1. A record in graph form produced by a tachograph. 2. In medicine, a graphic record of the movement and velocity of the blood current.
noun a graphical record of speed and distance produced by a tachograph