ἐξάγγελος
ἐξάγγ-ελος, ὁ, ἡ,
A). messenger who brings out news from within: hence, one who betrays a secret, informer, ἐ. γίγνεται ὡς .. 8.51 ; ἐ. γίγνεσθαί τινος Lg. 964e , etc.
II). on the Greek stage, messenger who told what was doing in the house or behind the scenes (opp. ἄγγελος, who told news from a distance); first used by Aeschylus, VS 1.9 .