Lewis & Short

2. Crassus, i, m., a family name in the gens Licinia. The most distinguished were,

  1. I. L. Licinius Crassus, a celebrated orator, a contemporary of Cicero, Cic. Brut. 38, 143; id. Off. 1, 30, 108 et saep.; cf. id. Brut. prol. pp. 68-77 Ellendt.
  2. II. M. Licinius Crassus, the triumvir.
    Hence, Crassĭānus, a, um, adj., of or belonging to the triumvir Crassus: exercitūs clades (in the war with the Parthians), Vell. 2, 82, 2; cf.: Crassiana clades, Plin. 6, 16, 18, § 47; Flor. 4, 9, 7.