from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A machine that records the measurements of a tachometer, especially one in a vehicle recording its speed and the times at which it was driven.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A device that records the distance and time traveled by a vehicle (especially a truck or coach), used to check the drivers' working time.

from the GNU version of the Collaborative International Dictionary of English

  • n. A recording or registering tachometer; also, its autographic record.

from The Century Dictionary and Cyclopedia

  • n. A recording tachometer applied to shafting or wheels to register rotation-speed; a speed-indicator. Also tacheograph.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a tachometer that produces a graphical record of its readings; used to record the speed and duration of trips in a motor vehicle


Greek takhos, speed + -graph.
(American Heritage® Dictionary of the English Language, Fourth Edition)


  • The new rules forbid drivers of commercial vehicles, including rescue tow trucks, from travelling more than 62 miles from their bases unless the vehicle is fitted with a tachograph – a device that monitors the number of hours spent on the road.

    Archive 2008-06-01

  • The jury heard expert evidence that the vehicle's tachograph showed Mr Shapland had been travelling at 55mph (89km/h) in a 40mph (64km/h) zone, and that braking had reduced the speed to 52mph (84km/h) at the point of impact.

    BBC News - Home

  • Those who admitted forging their tachograph records were: James Aird, 48, of Mountblow

    News round-up

  • All the charges related to alleged tachograph offences between November 2007 and November

    News round-up

  • A complex investigation by Cumbria police has led to 13 drivers working for a Northern Ireland haulage firm admitting falsifying their tachograph records.

    News round-up

  • And Patrick Boyle, the managing director, also pleaded not guilty to perverting the course of justice by attempting to dispose of tachograph vehicle units.

    News round-up

  • Hunkered down in his cab, the man reportedly gobbled up the paper discs of his truck's tachograph, which records speed and the time driven.

    Latest News - Yahoo!7 News

  • Using the integrated OmniExpress system's on-board computer with the vehicle's digital tachograph, Waberer's will be able to monitor driver and vehicle activities remotely.

    WebWire | Recent Headlines

  • Peter Johnson, of Inchcape Ford Farnborough, worked with them to determine the correct information regarding tachograph regulations and supported their fund-raising efforts through sponsorship from Inchcape Farnborough.

    Automotive Headlines

  • Hunkered down in his cab, the man reportedly gobbled up the paper discs of his truck's tachograph, which records the time driven.

    IOL: News


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  • (i) Think it's a typo for tachygraph.
    (ii) Look up in OED.
    (iii) Simultaneously have nagging feeling I've already wordied this.
    (iv) Look up on Wordie.
    (v) Get back to work.

    June 5, 2009

  • Thoughts and deeds on seeing it:
    (i) Think it's a typo for tachygraph.
    (ii) Web-search. Find it's the valid name for the thing.
    (iii) Think it's malformed Greek and should be tachygraph; web-search 'tachygraph'; find that's a name for something entirely different.
    (iv) Think it's appropriate and reasonable to make the alteration to the more familiar -o- in order to distinguish meanings.
    (v) Look up in OED; be reminded that tákhos "speed" is just as good a Greek word as takhýs "speedy", and that 'tachograph' therefore is well-formed.
    (vi) Enter on Wordie.
    (vii) Wonder if there are single-word verbs for 'OED' and 'Wordie' corresponding to 'google'.
    (viii) Get back to work.

    September 12, 2008