Heliogabalus (Helioga`balus) , a Roman emperor; invested, while yet a youth, with the Imperial purple by the army in 218; ruled with a show of moderation at first, but soon gave way to every manner of excess; was after four years put to death by the Prætorian Guard, and his body thrown into the Tiber.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Heliodorus * Heliography