fossorial

from WordNet (r) 3.0 (2006)

fossorial
    adj 1: (of limbs and feet) adapted for digging [ant:
           {cursorial}]

from The Collaborative International Dictionary of English v.0.48

Fossorial \Fos*so"ri*al\, a. [L. fossor a digger.]
   Fitted for digging, adapted for burrowing or digging; as, a
   fossorial foot; a fossorial animal.
   [1913 Webster]