PLUTONIC

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does plutonic mean? 

• PLUTONIC (adjective)
  The adjective PLUTONIC has 1 sense:

1. of igneous rock that has solidified beneath the earth's surface; granite or diorite or gabbro

  Familiarity information: PLUTONIC used as an adjective is very rare.

 Dictionary entry details 

• PLUTONIC (adjective)

Sense 1

Meaning:

Of igneous rock that has solidified beneath the earth's surface; granite or diorite or gabbro

Synonyms:

irruptive; plutonic

Similar:

intrusive (of rock material; forced while molten into cracks between layers of other rock)

Derivation:

pluton (large mass of intrusive igneous rock believed to have solidified deep within the earth)

 Context examples 

These cliffs, I may remark, are basaltic, and therefore plutonic.

(The Lost World, by Sir Arthur Conan Doyle)