μανυτάς

οῦ, ᾶ, Subst., ὁ
A. bringing to light, μ. χρόνος E. Hipp. 1051.
II. Subst., one who brings information, τοῖς μέλλουσιν ἀποθανεῖσθαι μ. γενέσθαι Lys. 12.32, cf. Jul. Or. 5.167b: mostly in legal sense, informer, Th. 1.132, etc.; as epith. of Heracles, Vit.Soph; ἀδικήματος Antipho 2.2.5; μ. κατά τινος Id. 5.24, And. 1.19, Lys. 13.2; κατὰ σαυτοῦ μ. ἐπὶ τοῖς συμβᾶσι γεγονώς D. 18.284; τῶν ἀποκτεινάντων Antipho 2.4.3; of a woman, Cratin. 428.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project