Lewis & Short

discordĭa, ae, f. [discors],

  1. I. disunion, disagreement, dissension, variance, discord (class.), Plaut. Truc. 2, 4, 66; Ter. Hec. 4, 4, 71; Cic. Tusc. 4, 9, 21; id. Lael. 7, 24; id. Off. 1, 25, 85; id. Mur. 39, 83; Sall. C. 5, 2; Liv. 2, 24 et saep.; Verg. E. 1, 72; id. A. 7, 545; Hor. Epod. 4, 2; id. S. 1, 4, 60 et saep.
    In plur., Cic. Lael. 7, 23; id. Off. 1, 25, 86; id. Fin. 1, 13, 44; id. Mur. 23, 47; Suet. Calig. 26; id. Claud. 25; Vulg. Prov. 6, 19 et saep.
    1. B. Transf.
      1. 1. The subject of strife: Idae et Phoebo discordia Eveni filia, Prop. 1, 2, 17.
      2. 2. Of inanimate things: principiorum, Lucr. 5, 440: rerum, id. 6, 366: ponti, Luc. 5, 646: incertae mentis, Ov. M. 9, 630 et saep.
  2. II. Personified: Discordia, the goddess of discord, the Greek Eris, Verg. A. 6, 280; 8, 702 Serv.; Stat. Th. 5, 74; Petr. 124, 27 sq.; Hyg. Fab. praef.
    Hence, Discordiae malum, the famous apple of Eris in the fable, the apple of discord, Just. 12, 15, 11.