aegis

noun2

1. •
   A mythological shield associated with the Greek deities Zeus and Athena (and their Roman counterparts Jupiter and Minerva) shown as a short cloak made of goatskin worn on the shoulders, more as an emblem of power and protection than a military shield. The aegis of Athena or Minerva is usually shown with a border of snakes and with the head of Medusa in the center.

   • In her right hand Minerva bore a beaming lance, and in her left a buckler, called the Egis. The Egis of Minerva had embossed upon it the head of Medusa. — 1849
2. •
   (figurative) Guidance, protection; endorsement, sponsorship.

   • The original designs were drawn up under the aegis of Mr. O. V. S. Bulleid, then Chief Mechanical Engineer. — 1950