PLUTONIC

irruptive, plutonic

(adjective) of igneous rock that has solidified beneath the earth’s surface; granite or diorite or gabbro

Source: WordNet® 3.1

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Etymology

Adjective

Plutonic (comparative more Plutonic, superlative most Plutonic)

(Greek mythology, Roman mythology) synonym of Plutonian

(by extension) synonym of Plutonian

(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.

Synonyms: abyssal, intrusive, Plutonian

(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”).

Synonym: Plutonian

Etymology 1

Adjective

plutonic (comparative more plutonic, superlative most plutonic)

Alternative letter-case form of Plutonic

Etymology 2

Adjective

plutonic (not comparable)

(inorganic chemistry) Containing plutonium in a higher oxidation state.

Source: Wiktionary

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Plu*ton"ic, a. Etym: [Cf. F. plutonique. See Pluto.]

1. Of or pertaining to Pluto; Plutonian; hence, pertaining to the interior of the earth; subterranean.

2. 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.

– Plutonic rocks (Geol.), granite, porphyry, and some other igneous rocks, supposed to have consolidated from a melted state at a great depth from the surface. Cf. Intrusive rocks, under Intrusive.

– Plutonic theory. (Geol.) See Plutonism.

Source: Webster’s Unabridged Dictionary 1913 Edition

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