Wiktionary
n. A world that makes up part of a larger world.
Usage examples of "subworld".
Phaid could feel a coldness, an absolute lack of feeling that could only survive in some purple and yellow subworld on the far side of decadence.
When he broke sunwards in his daring surge, he veritably soared through solid stone, breaching the floor of the Secondary Subworld, and plunging upwards through its massy vault.
A process that took hours, during which one was completely vulnerable as the life force was poured, slowly, across the subworld of chaos and back into the real world of Ryetelth, only in a different location.
And, conceivably, the subworlds were populated according to Undle Ninefingers' suggestion, which holds that the demons arose as a "spiritual distillate" of human evil, a "coagulation" of psychic energies into the material entities we know today.
He'd sworn his life away, and it stood forfeit by all laws known in this world and the subworlds alike.
She told Barnar that the fastest being, in the upper world and the subworlds alike, is a basiliscus.
In the subworlds, the merciless seethe of appetites never simmers down.