ekkyklēma (ἐκκύκλημα) : ek-KICK-lay-ma

(Greek: “roll-out machine”). Moving platform used in Greek performances for revealing or changing scenes. A wheeled platform or cart, housed within the skēnē and used to bring interior scenes into view; reveal the result of an “out of view” action, e.g. the murder of Agamemnon in Aeschylus’s Agamemnon. According to Bieber, the ekkyklēma was introduced in 5th century BCE Greece; could be square, semi-circular, or round; may have revolved on a pivot, and may have been used in conjunction with moving screens (scaena ductilis).