Definitions from Wiktionary (Plutonian)

▸ adjective:  (Greek mythology, Roman mythology) Of or relating to Pluto, the Greek and Roman god of the underworld; demonic, infernal.
▸ adjective:  (by extension) Of, relating to, or having characteristics associated with the underworld; dark, gloomy; mournful.
▸ adjective:  (by extension, geology) Synonym of plutonic (“of or pertaining to rocks formed deep in the Earth's crust, rather than by volcanoes at the surface of the Earth”)
▸ adjective:  (by extension, geology, historical) Synonym of plutonic (“of, pertaining to, or supporting plutonism, the theory that the rocks of the Earth were formed in fire by volcanic activity, with a continuing gradual process of weathering and erosion, then deposited on the sea bed, re-formed into layers of sedimentary rock by heat and pressure, and raised again”)
▸ noun:  (geology, historical) A proponent of plutonism; a plutonist.
▸ adjective:  (astrology) Pertaining to the astrological influence of Pluto, formerly regarded as a planet.
▸ adjective:  (astronomy) Of or relating to the dwarf planet Pluto.
▸ noun:  (astrology) A person under the astrological influence of Pluto, formerly regarded as a planet.
▸ noun:  (chiefly science fiction) An inhabitant of the dwarf planet Pluto.



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