say it: ploo-TAH-nik
plutonic is an adjective meaning "of igneous rock that has solidified beneath the earth's surface; granite or diorite or gabbro". It carries one recorded sense.
Definitions, synonyms and semantic relations for plutonic come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.