Learn how to say Plutonism correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word plutonism:
[mass noun] Geology
the formation of intrusive igneous rocks by solidification of magma beneath the earth’s surface.
(Plutonism) historical the theory (now accepted) that rocks such as granite were formed by solidification from the molten state, as proposed by James Hutton and others, rather than by precipitation from the sea. Compare with Neptunism.
noun & adjective ( historical)