plutonic

American  

[ploo-ton-ik] / pluˈtɒn ɪk /

adjective

Geology.

1. noting or pertaining to a class of igneous rocks that have solidified far below the earth's surface.

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plutonic British  

/ pluːˈtɒnɪk /

adjective

1. Also: abyssal.  (of igneous rocks) derived from magma that has cooled and solidified below the surface of the earth

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Etymology

Origin of plutonic

1790–1800; < Latin Plūtōn- (stem of Plūtō Pluto < Greek Ploútōn ) + -ic; originally referring to the Plutonic theory ( plutonism )

Example Sentences

However, Page Six reports that the duo’s relationship is plutonic and not romantic.

From Fox News • Aug. 3, 2021

On the figure above, the top row has both plutonic and volcanic igneous rocks arranged in a continuous spectrum from felsic on the left to intermediate, mafic, and ultramafic toward the right.

From Textbooks • Jan. 1, 2017

“We’re exactly like a man capable of sustaining a plutonic friendship with an attractive female co-worker — we’re entirely hypothetical.”

From New York Times • Jul. 24, 2015

Oliver Sacks writes of his own experience with aluminum chemistry, “Huge energies, plutonic forces, were being unleashed, and I had a thrilling, but precarious sense of being in control—sometimes just.”

From Slate • May 3, 2013

The plutonic or intrusive rocks, which have been forced into the crust and have consolidated there, present a wide range of texture from the most coarse-grained granites to the most perfect natural glass.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" by Various