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Wiktionary
sibyllic

a. Of or relating to a sibyl (pagan female oracle or prophetess).

WordNet
sibyllic

adj. resembling or characteristic of a prophet or prophecy; "the high priest's divinatory pronouncement"; "mantic powers"; "a kind of sibylline book with ready and infallible answers to questions" [syn: divinatory, mantic, sibylline, vatic, vatical]