The story
Back-formation from Plutonic.
Etymology from Wiktionary, CC BY-SA 4.0.
pluton
Today it means: A body of igneous rock formed beneath the surface of the earth by consolidation of magma Full definition →
Today it means: A body of igneous rock formed beneath the surface of the earth by consolidation of magma Full definition →
Back-formation from Plutonic.
Etymology from Wiktionary, CC BY-SA 4.0.