fos·so·ri·al 
(fŏ-sôrē-əl)
(fŏ-sôrē-əl)adj.
Zoology
Zoology
1. Burrowing or living underground: fossorial lizards.
2. Relating to or used for burrowing or digging: fossorial habits; fossorial legs.
[From Late Latin fossōrius, from Latin fossus, past participle of fodere, to dig.]