The Collaborative International Dictionary of English v.0.48:

aegis \ae"gis\ ([=e]"j[i^]s), n. [L. aegis, fr. Gr. a'igi`s a
   goat skin, a shield, a'i`x goat, or fr. 'ai`:ssw to rush.]
   A shield or protective armor; -- applied in mythology to the
   shield of Jupiter which he gave to Minerva. Also fig.: A
   shield; a protection.
   [1913 Webster]

WordNet (r) 3.0 (2006):

aegis
    n 1: kindly endorsement and guidance; "the tournament was held
         under the auspices of the city council" [syn: auspices,
         protection, aegis]
    2: armor plate that protects the chest; the front part of a
       cuirass [syn: breastplate, aegis, egis]

The Free On-line Dictionary of Computing (19 January 2023):

AEGIS

    A Unix variant that was used on Apollo
   workstations before Apollo was bought by Hewlett Packard.
   AEGIS has some advantages over standard BSD or System V
   Unix.  It includes faster file access and a richer command
   set; there are commands to find out which process is running
   on a particular node, which process is locking a particular
   file, etc.

   (1997-02-25)


The Free On-line Dictionary of Computing (19 January 2023):

Aegis

    A CASE tool for project change
   management written by Peter Miller, with minor contributions
   by a few others.  Aegis is licensed using the GNU GPL but is
   not a GNU project.

   Aegis Home (http://aegis.sourceforge.net/).

   (2005-03-24)