The Collaborative International Dictionary of English v.0.48:
Tartarean \Tar*ta"re*an\, Tartareous \Tar*ta"re*ous\, a. [L. tartareus: cf. F. tartar['e]en.] Of or pertaining to Tartarus; hellish. [1913 Webster]WordNet (r) 3.0 (2006):
Tartarean adj 1: of or relating to or characteristic of Hades or Tartarus [syn: Hadean, Plutonian, Tartarean]