u·rae·us 
(y-rēəs)
(y-rēəs)n.
The figure of the sacred serpent, an emblem of sovereignty depicted on the headdress of ancient Egyptian rulers and deities.
[New Latin ūraeus, from Late Greek ouraios, cobra, perhaps alteration (influenced by Greek ouraios, of the tail) of Egyptian y'rt.]
uraeusmural painting of Thutmosis IV from the Tomb of Thutmosis IV in the Valley of the Kings
Thebes, Egypt