Lewis & Short

Pūblĭcĭus, i, m., the name of a Roman gens; esp. the brothers L. and M. Publicius Malleolus, œdiles, Varr. L. L. 5, 32 fin.; Ov. F. 5, 288.
Hence,

  1. A. Pūblĭcĭus, a, um, adj., Publician: Clivus Publicius, a hill in Rome, Liv. 26, 10, 6; 27, 37 fin.; Ov. F. 5, 294.
  2. B. Publĭcĭānus, a, um, adj., of or belonging to a Publicius, Publician: locus, prob. the Clivus Publicius (v. supra), Cic. Att. 12, 38, 4: actio, so called after a prætor named Publicius, Dig. 6, tit. 2; cf. Just. Inst. 4, 6, 4.