Mandaean cosmology

In Mandaean cosmology, Tibil () or occasionally Arqa ḏ-Tibil (lit. "Tibil-Earth") is the Earth (World) or earthly middle realm. It is separated from the World of Light (alma ḏ-nhūra) above and the World of Darkness (alma ḏ-hšuka) below by ayar (aether).