Definitions for "Tartarus"
The infernal regions, described in the Iliad as situated as far below Hades as heaven is above the earth, and by later writers as the place of punishment for the spirits of the wicked. By the later poets, also, the name is often used synonymously with Hades, or the Lower World in general.
In mythology it is the infernal region further down than Hades where Zeus supposedly confined the Titans.
The deepest abyss in Hades. Where Kronos was imprisoned.
Keywords:  nullarbor, relict, cave, genus, spiders
Tartarus is a genus of spiders. All four described species are found in cave systems of the Nullarbor Plain of Western Australia. They are likely relict species from the time when the region was much more humid, given the fact that closely related spiders from Southern Australia live in forests.
Tartarus is a fictional character, a mutant in the Marvel Comics Universe. His first appearance was in X-Men (2nd series) #101.