plutonic
UK /pluːˈtɒnɪk/ · US /pluˈtɑnɪk/ adjective
- adjective (inorganic chemistry) Containing plutonium in a higher oxidation state.
- adjective (Greek mythology, Roman mythology) Synonym of Plutonian (“of or relating to Pluto, the Greek and Roman god of the underworld; demonic, infernal”).
- adjective (by extension) Synonym of Plutonian (“of, relating to, or having characteristics associated with the underworld; dark, gloomy; mournful”).
- adjective (by extension, geology, mineralogy) 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) 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”).
Synonyms
Hadean Plutonian Tartarean Acherontic infernal hellish helly stygian subtartarean cimmerian tenebrous dismal melancholic adumbral blear caliginous crepuscular dark darksome darkling irruptive
Etymology
From pluton(ium) + -ic.
See Plutonic.
From Ancient Greek Πλούτων (Ploútōn, “Pluto, Greek and Roman god of the underworld”) (from πλοῦτος (ploûtos, “riches, wealth”) (ultimately from Proto-Indo-European *plew- (“to fly; to flow; to run”)) + -ων (-ōn)) + -ic (suffix forming adjectives meaning ‘of or pertaining to’). The English word is cognate with Middle French plutonique (modern French plutonique (“of or pertaining to Pluto, the underworld, or the interior of the Earth”)).
Webster’s 1913
- adjective Of or pertaining to Pluto; Plutonian; hence, pertaining to the interior of the earth; subterranean.
- adjective Of, pertaining to, or designating, the system of the Plutonists; igneous; as, the Plutonic theory. Plutonic action (Geol.), the influence of volcanic heat and other subterranean forces under pressure.
Etymology [Cf. F. plutonique. See Pluto.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “plutonic”, CC BY-SA 4.0. Details