Lewis & Short

lā̆trōcĭnor, ātus, 1, v. dep. [2. latro].

  1. I. To perform military service for pay, to be a hired soldier (ante-class.): ibit aliquo Latrocinatum, Plaut. Trin. 2, 4, 198; id. Mil. 2, 6, 19: qui regi latrocinatus decem annos Demetrio, id. Fragm. ap. Varr. L. L. 7, § 52 Müll.
  2. II. To practise freebooting, robbery, or highway-robbery, to rob on the highway: Catilina latrocinantem se interfici mallet, quam exsulem vivere, Cic. Cat. 2, 7 fin.: ubi impune sui posteri latrocinarentur, id. Mil. 7, 17: vitae instituta sic distant, ut Cretes et Aetoli latrocinari honestum putent, id. Rep. 3, 9, 15.
    To commit piracy: maritimi, alteri mercandi causa, alteri latrocinandi, Cic. Rep. 2, 4, 9.
    1. B. Transf.
      1. * 1. Of a fish preying upon others, to hunt, seize: pastinaca latrocinatur ex occulto, Plin. 9, 42, 67, § 144.
      2. * 2. Of a physician who dissects a body: mortui praecordia et viscus omne in conspectum, Cels. 1 praef.
        Hence. lā̆trōcĭnanter, adv., like a robber, Aug. Ep. 35, 3.