fossorial

[fo-sawr-ee-uhl, -sohr-]
adjective Zoology.
1.
digging or burrowing.
2.
adapted for digging, as the hands, feet, and bone structure of moles, armadillos, and aardvarks.

Origin:
1830–40; < Late Latin fossōri(us) adapted to digging (equivalent to Latin fod(ere) to dig + tōrius -tory1, with dt > ss) + -al1

subfossorial, adjective
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World English Dictionary
fossorial (fɒˈsɔːrɪəl)
 
adj
1.  (of the forelimbs and skeleton of burrowing animals) adapted for digging
2.  (of burrowing animals, such as the mole and armadillo) having limbs of this type
 
[C19: from Medieval Latin fossōrius from Latin fossor digger, from fodere to dig]

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Example sentences
Thin, with dark blue sides and a narrow band along the spine, the so-called
  dwarf fossorial snake lacks fangs and venom.
The adults are terrestrial and fossorial, except during the breeding season.
These salamanders are fossorial during the nonbreeding season and migrate to
  ponds, streams, or pools to breed.
Compacted soils can also deter tunneling of fossorial animals.
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