Source : Webster's Revised Unabridged Dictionary (1913)

Pes \Pes\, n.; pl. {Pedes} . [L., the foot.] (Anat.)
   The distal segment of the hind limb of vertebrates, including
   the tarsus and foot.

Source : WordNet®

pes
     n : the foot of a human being; "his bare feet projected from his
         trousers"; "armored from head to foot" [syn: {foot}, {human
         foot}]
     [also: {pedes} (pl)]