Sĭb'yl-line, a.

(Synop., § 130), a. [Lat. sibyllinus.] Pertaining to the sibyls; uttered, written, or composed by sibyls; like the productions of sibyls.

Sibylline books, books or documents of prophecies in verse, supposed to contain the fate of the Roman empire, and said to have been purchased by Tarquin the Proud from a sibyl. Brande.