Source : Webster's Revised Unabridged Dictionary (1913)

Erinys \E*rin"ys\, n.; pl. {Erinyes}. [L., fr. Gr. ?.] (Class.
   Myth.)
   An avenging deity; one of the Furies; sometimes, conscience
   personified. [Written also {Erinnys}.]

Source : WordNet®

Erinyes
     n : (classical mythology) the hideous snake-haired monsters
         (usually three in number) who pursued unpunished
         criminals [syn: {Fury}, {Eumenides}]