Cambyses (kam-by'-seez). The son of Cyrus, king of the Persians. Succeeded his father in 529 B.C. He conquered Cyprus and Egypt. At Memphis, he caused the bull Apis to be slaughtered by his priests. Leaving Egypt to return to Persia, he died at Ecbatana of a wound he had received from his own sword when mounting his horse in 522 B.C.