fossĭo — Lewis & Short
fossĭo, ōnis, f.fodio,
I a digging (rare but class.):
recenti fossione terram fumare calentem,Cic. N. D. 2, 9, 25; Col. 11, 2, 41; Plin. 17, 26, 39, § 247.—In plur.:
quid fossiones agri repastinationesque proferam?Cic. de Sen. 15, 53.—
II Transf., a ditch, Vitr. 8, 1, 5.