in Grecian Mythology, a giant, the son of Æther, Titan, or Cœlus, and Terra. This was the name he received in heaven; but that by which he was known on earth was Ægeon. He was of singular service to Jupiter, when Juno, Pallas, Neptune, and the rest of the gods, endeavoured to dethrone him; but he afterwards conspired with the rest of his gigantic brethren to dethrone the father of the gods. Virgil describes Briareus as having a hundred arms and fifty heads, and breathing out fire. The fable says that as a punishment he was thrust by Jupiter under Ætna, and that whenever he moves the mountain belches forth fire.