[oh-duh-graf, -grahf]
  1. a recording odometer.
  2. a pedometer.
  3. Nautical. an instrument for recording courses steered by a vessel with the distances or lengths of time run on each.

Origin of odograph

1880–85; variant of hodograph < Greek hodó(s) way + -graph
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018