3. The second son of Antiochus VII. Sidetes, and elder brother of Antiochus Cyzicenus. In the battle against the Parthians, in which Antiochus Sidetes was slain, B. C. 128, Seleucus was taken prisoner : he was kindly received by the Parthian monarch, and treated with royal magnificence ; but it does not appear that he ever regained his liberty (Euseb. Arm. p. 167). A passage of Posidonius (apud Athen. iv. p. 153), which had been referred by Froelich and other writers to SELEUCUS CALLINICUS, evidently relates to the captivity of this Seleucus, though Athenaeus inadvertently gives him the title of king. (Niebuhr, Kl. Schrift. p. 300.)