(n) :
a mythological
shield associated with
Zeus and Athena shown as a short cloak consisting of a
goatskin. The aegis of Athena is usually shown with a border of snakes and with the head of Medusa in the center. The aegis is more an emblem of protection and power than an actual military shield; protection, guidance. Usually used as 'under the aegis' because of its origin as protection of the shield of
Athena