'Pedograph' definitions:

Definition of 'Pedograph'

From: GCIDE

Pedograph \Ped"o*graph\ (p[e^]d"[-o]*gr[.a]f), n. [Gr. pe`don ground + -graph.] An instrument carried by a pedestrian for automatically making a topographical record of the ground covered during a journey. [Webster 1913 Suppl.]