The Collaborative International Dictionary of English v.0.48:
Plutonian \Plu*to"ni*an\, n. (Geol.) A Plutonist. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Plutonian \Plu*to"ni*an\, a. [L. Plutonius, Gr. ?: cf. F. plutonien.] Plutonic. --Poe. [1913 Webster]WordNet (r) 3.0 (2006):
Plutonian adj 1: of or relating to or characteristic of Hades or Tartarus [syn: Hadean, Plutonian, Tartarean]