or CISSUM, in Ancient Geography, a town of the Hither Spain, in Lusitania, on the east side of the Iberus (thought to be Guiflona), where the Carthaginians were first defeated by Scipio. Another Cissa of Thrace, situated on the river Ægros Potamus, which Skylax seems to call Creffa, or Criffa; so that the reading is doubtful.