Armor plate that protects the chest; the front part of a cuirass WordNet 3.0 & Open English WordNet

The aegis, as stated in the Iliad, is a device carried by Athena and Zeus, variously interpreted as an animal skin or a shield and sometimes featuring the head of a Gorgon. Wikipedia

A breastplate or chestplate is a device worn over the torso to protect it from injury, as an item of religious significance, or as an item of status. Wikipedia

Shield, buckler, or breastplate of Athena and Zeus bearing the head of Medusa Wikidata

A armor plate that protects the chest; the front part of a cuirass. OmegaWiki

Armor plate that protects the chest. OmegaWiki

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. Wiktionary

Mythological shield. Wiktionary (translation)

A piece of armor that covers the chest. Wiktionary

Armor. Wiktionary (translation)