• WordNet 3.6
    • adj plutonic of igneous rock that has solidified beneath the earth's surface; granite or diorite or gabbro
    • ***
Webster's Revised Unabridged Dictionary
    • Plutonic Of or pertaining to Pluto; Plutonian; hence, pertaining to the interior of the earth; subterranean.
    • Plutonic Of, pertaining to, or designating, the system of the Plutonists; igneous; as, the Plutonic theory.
    • ***
Century Dictionary and Cyclopedia
    • plutonic Of or relating to Pluto or the regions of fire; subterranean; dark.
    • plutonic Pertaining to or designating the system of the Plutonists: as, the Plutonic theory.
    • plutonic In geology, formed deep below the surface. Plutonic rocks are such igneous rocks as have been formed under conditions of depth and pressure, and have cooled slowly, so as to have acquired in general a distinctly crystalline structure : the term Plutonic is opposed to volcanic, the former designating rocks formed at some depth beneath the surface, the latter rocks of igneous origin but of superficial formation. As used by Lyell, the word is nearly the equivalent of metamorphic.
    • ***


Webster's Revised Unabridged Dictionary
Cf. F. plutonique,. See Pluto


In literature:

These cliffs, I may remark, are basaltic, and therefore plutonic.
"The Lost World" by Arthur Conan Doyle
As to flint, that would not be wanting in these regions of Plutonic origin.
"The Mysterious Island" by Jules Verne
But to admit the "Plutonic" origin of such widespread formations was practically to abandon the Neptunian hypothesis.
"A History of Science, Volume 3(of 5)" by Henry Smith Williams
New Zealand is, in fact, a formation of recent plutonic origin.
"In Search of the Castaways" by Jules Verne
PLUTONIC THEORY, the theory that unstratifled rocks were formed by fusion in fire.
"The Nuttall Encyclopaedia" by Edited by Rev. James Wood
That craft looks just like the 'Pluton.
"A Gunner Aboard the "Yankee"" by Russell Doubleday
Into this plutonic realm we plunged, and, after a scorching ride, reached the head of a pass which led straight down to the desert.
"Mr. Fortescue" by William Westall
The name Plutonic or Massive rocks is, however, now almost universally substituted for that of Primary.
"Young Folks' Library, Volume XI (of 20)" by Various
Two destroyers, Furor and Pluton, met their fate near the harbor.
"History of the United States, Volume 5" by E. Benjamin Andrews
The "Pluton" kept her engines going just long enough to drive her ashore under the Socapa cliffs.
"Famous Sea Fights" by John Richard Hale
The accessible deposits of the deep zone are associated with plutonic igneous rocks which have been deeply eroded, and not with surface lavas.
"The Economic Aspect of Geology" by C. K. Leith
Plutonic rocks, how formed, 161.
"Principles of Geology" by Charles Lyell
The plutonic rocks may be treated of next in order, as they are most nearly allied to the volcanic class already considered.
"A Manual of Elementary Geology" by Charles Lyell
One of our huge shells fell midway of the Pluton, which at once went down with an awful plunge.
"The Story of American History" by Albert F. Blaisdell
Boulders of plutonic rocks from this area have been widely distributed by the ice during the glacial period.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8" by Various
Igneous rocks in great variety and in all forms incident to an extruded or volcanic and intruded or plutonic origin are present.
"North America" by Israel C. Russell
Faro fuggir Plutone e Satanasso, E 'l can trifauce levero dal passo.
"Renaissance in Italy: Italian Literature" by John Addington Symonds
Plutonic rocks do not present evidence of their precise geological age.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6" by Various
A little examination of the material should tell, to even the novice, whether or not the substance is of plutonic origin.
"The Business of Mining" by Arthur J. Hoskin
Our phrase 'plutonic rock' would then have a very prosaic sense.
"Demonology and Devil-lore" by Moncure Daniel Conway