from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of deep igneous or magmatic origin: plutonic rocks.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. An igneous rock that cooled and hardened below the earth's surface.
from the GNU version of the Collaborative International Dictionary of English
- adj. Of or pertaining to Pluto; Plutonian; hence, pertaining to the interior of the earth; subterranean.
- adj. Of, pertaining to, or designating, the system of the Plutonists; igneous.
from The Century Dictionary and Cyclopedia
- Of or relating to Pluto or the regions of fire; subterranean; dark
- Pertaining to or designating the system of the Plutonists: as, the Plutonic theory.
- In geology, formed deep below the surface.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. of igneous rock that has solidified beneath the earth's surface; granite or diorite or gabbro
From Latin Plūtō, Plūtōn-, Pluto; see Pluto.(American Heritage® Dictionary of the English Language, Fourth Edition)
From French plutonique ("of or pertaining to Pluto, the underworld, interior of the earth") (Wiktionary)