The recording of speed or rate. ... Origin: G. Tachos, speed, + grapho, to write ... (05 Mar 2000) ... 
(tә-kog´rә-fe) the recording of the movement and speed of the blood current.
Type: Term Pronunciation: tă-kog′ră-fē Definitions: 1. The recording of speed or rate.
tachograph, tachography 1. An instrument that produces a record of the use and reading of a tachometer, especially one in a commercial vehicle or bus recording speeds and distances traveled. Essentially, a tachograph records the hours worked by a driver. 2. In medicine, the recording of the speed of the blood current.tachography The recording of speed or rate.