The meaning of Plutonic and additional information.

Plutonic(a.) Of or pertaining to Pluto; Plutonian; hence, pertaining to the interior of the earth; subterranean.

Plutonic(a.) Of, pertaining to, or designating, the system of the Plutonists; igneous; as, the Plutonic theory.

Plutonism(n.) The theory, early advanced in geology, that the successive rocks of the earth's crust were formed by igneous fusion; -- opposed to the Neptunian theory.