
odometer; instrument for measuring distance travelled
Found on 
http://phrontistery.info/o.html

• (n.) A machine for registering the distance traversed by a vehicle or pedestrain. • (n.) A device for recording the length and rapidity of stride and the number of steps taken by a walker.
Found on 
http://thinkexist.com/dictionary/meaning/odograph/
 O'do·graph  noun
O'do·graph  noun [ Greek ... way + 
 - graph .] 
 1.  A machine for registering the distance traversed by a vehicle or pedestrain.  
 2.  A device for recording the length and rapidity of stride and the number of steps taken by a walker. 
Found on 
http://www.encyclo.co.uk/webster/O/11

odograph 1. An instrument for recording the distance and course traveled by a vehicle.  2. A recording odometer or a pedometer.  3. An instrument for recording courses steered by a vessel with the distances or lengths of time run on each one.
Found on 
http://www.wordinfo.info/words/index/info/view_unit/2724/45
  No exact match found.