Engastrimythi
From BiblePortal Wikipedia
Engastrimythi [1]
(Gr. Ἐν , In, Γαστήρ , The Belly, and Μῦθος , An Utterance), a name given to the priestesses of Apollo, from a species of ventriloquism which they practiced, speaking from within, while not the slightest motion of the lips could be observed. The voice was supposed to proceed from a spirit within the body of the Pythoness (q.v.).