Lewis & Short

Aegyptĭăcus, a, um, adj., Egyptian (a later form for the class. Aegyptius): libri, Gell. 10, 10: lingua, Vulg. Gen. 41, 45: incantationes, ib. Exod. 7, 11: partes, Cod. Th. 13, 5, 14.
Adv.: Aegyptĭăcē, after the Egyptian manner: loqui, Treb. Poll. 30, Tyr. 30.