ege·ria \ə̇ˈjirēə, ēˈ-\noun (-s) Usage: usually capitalized Etymology: after Egeria, mythical adviser of Numa Pompilius, legendary 2d king of Rome, from Latin : a woman adviser or companion < listening to the promptings of his Egeria — Encyc. Britannica > < the most highly esteemed as an Egeria by his old friends — Janet Flanner >