egyp·ti·ac \ə̇ˈjiptēˌak, (ˈ)ē|j-\adjective Usage: usually capitalized Etymology: Latin Aegyptiacus, from Greek Aigyptiakos, from Aigyptos Egyptian : of or relating to ancient Egypt < Egyptiac society … became extinct in the 5th century of the Christian era — A.J.Toynbee >