[f. as prec. + -ING1.] The action of BURROW v.1 Also attrib.

1

1771.  Barrington, in Phil. Trans., LXII. 4. Its property of burrowing.

2

1836–9.  Todd, Cycl. Anat. & Phys., II. 161/2. With reference to its burrowing habits.

3