scrobiculus

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

scrŏbĭcŭlus, i, m. [scrobis],

a little ditch or trench , Varr. ap. Non. 225, 9; Col. 4, 15, 3; 5, 6, 8; id. Arb. 30, 1; Plin. 21, 5, 13, § 26.