Peg·a·sus 
(pĕgə-səs)
(pĕgə-səs)n.
1. Greek Mythology A winged horse that with a stroke of his hoof caused the fountain Hippocrene to spring forth from Mount Helicon.
2. A constellation in the Northern Hemisphere near Aquarius and Andromeda.
[Middle English, from Latin Pēgasus, from Greek Pēgasos.]
Pegasus4th-century bc Greek coin