Definition of odograph in US English:

odograph

noun

historical
  • A device for automatically recording the course of a vehicle. Also (in early use): an instrument for measuring the length of stride of a person, animal, etc., and the number of paces taken.

Origin

Late 19th century; earliest use found in Nature: a weekly journal of science. From French odographe (Étienne-Jules Marey, 1878) from ancient Greek ὁδός way + French -graphe.