Cyclops(Gr. , from a circle, and , an eye), in Grecian mythology, giants with but one circular eye, in the middle of the forehead, of whom there are various traditions. Those of the Odyssey are a race of cannibal shepherds in Sicily, whose chief is Polyphemus. The Cyclops of Hesiod are sons of Coelus (Uranus) and Terra (Ge), called Brontes, Steropes, and Arges, who were hurled into Tartarus by their father, released and reimprisoned by Saturn, and finally freed by Jupiter, whose thunderbolts they made, as well as Pluto's helmet and Neptune's trident. They were killed by Apollo, in revenge for the death of his son Aesculapius, who was destroyed by Jupiter with the thunderbolts they had furnished him. A later tradition makes them the assistants of Vulcan, forging metallic armor and ornaments for gods and heroes in the volcanoes of Lemnos and Lipari, and under Mt. 'Etna. According to K. O. Muller, the Cyclops of Hesiod denote the transient disturbances of the order of nature by storms; Grote finds this opinion unsupported by the "Theogony" of the poet. - The name of Cyclopean walls has been given to those huge un-cemented walls of unhewn stones, of which remains abound in several regions of Greece, chiefly in Argolis, and in Etruria, and which were probably mostly erected by Pelasgians. In English the word Cyclops is both singular and plural.