I'si-ac, a.

(110), a. [Lat. Isiacus, Gr. Ἰσιακός, from Isis.] Pertaining to the goddess Isis; as, Isiac mysteries.

Isiac table, a plate of copper or brass, now at Turin, having a figure of the goddess Isis in the center, surrounded by compartments on which are engraven numerous hieroglyphics and various scenes relating to the mysteries of Isis. It was found at Rome in 1525. Wright.