PLUTONIAN
Hadean, Plutonian, Tartarean
(adjective) of or relating to or characteristic of Hades or Tartarus
Source: WordNet® 3.1
Etymology 1
Adjective
Plutonian (comparative more Plutonian, superlative most Plutonian)
(Greek mythology, Roman mythology) Of or relating to Pluto, the Greek and Roman god of the underworld; demonic, infernal.
Synonyms: Plutonic, Plutonical (obsolete)
(by extension) Of, relating to, or having characteristics associated with the underworld; dark, gloomy; mournful.
Synonym: plutonic
(by extension, geology) synonym of plutonic
Synonyms: abyssal, intrusive
(by extension, geology, historical) synonym of plutonic
Noun
Plutonian (plural Plutonians)
(geology, historical) A proponent of plutonism; a plutonist.
Antonyms: Neptunian, Neptunist
Etymology 2
Adjective
Plutonian (not comparable)
(astrology) Pertaining to the astrological influence of Pluto, formerly regarded as a planet.
(astronomy) Of or relating to the dwarf planet Pluto.
Noun
Plutonian (plural Plutonians)
(astrology) A person under the astrological influence of Pluto, formerly regarded as a planet.
(chiefly, science fiction) An (imaginary) inhabitant of the dwarf planet Pluto.
Source: Wiktionary
Plu*to"ni*an, a. Etym: [L. Plutonius, Gr. plutonien.]
Definition: Plutonic. Poe.
Plu*to"ni*an, n. (Geol.)
Definition: A Plutonist.
Source: Webster’s Unabridged Dictionary 1913 Edition