Source : Webster's Revised Unabridged Dictionary (1913)

Footmark \Foot"mark`\, n.
   A footprint; a track or vestige. --Coleridge.

Source : WordNet®

footmark
     n : a mark of a foot or shoe on a surface; "the police made
         casts of the footprints in the soft earth outside the
         window" [syn: {footprint}, {step}]