• (a.) Adapted for digging; -- said of the legs of certain insects.
<entomology, zoology> Adapted for digging; said of the legs of certain insects. ... (30 Mar 1998) ... 
Fos·so'ri·ous adjective (Zoology) Adapted for digging; -- said of the legs of certain insects. 
fossorious Adapted for digging; a reference to the legs of certain insects.