ἐγγαστρίμυθος
From LSJ
Δύο γὰρ, ἐπιστήμη τε καὶ δόξα, ὧν τὸ μὲν ἐπίστασθαι ποιέει, τὸ δὲ ἀγνοεῖν → Two different things are science and belief: the one brings knowledge, the other ignorance
English (LSJ)
ον,
A ventriloquist, mostly of women who delivered oracles by this means: hence, = ἐγγαστρίμαντις, Hp.Epid.5.63, Philoch.192, LXX Le.19.31, Ph.1.654, Plu.2.414e, Luc.Lex.20; also, the familiar spirit of such a person, LXX 1 Ki.28.8.