Lewis Short
(adj.adv.) : lātrōcĭnālis, e, adj.2. latro, II.
* Of or belonging to robbers, robber- (post-class.): manus,a band of robbers,App. M. 2, p. 125, 5: castra,Amm. 27, 2.—Hence, adv.: lă-trōcĭnālĭter, after the manner of a robber, like a robber: aliquem interimere,Mart. Cap. 6, § 642.
Charlton T. Lewis, Charles Short, A Latin Dictionary