- Geol. formed at great depth by intense heat and pressure: said of rock, esp. intrusive igneous rock, that is typically coarsegrained and granitelike
Origin of Plutonic; from Classical Latin Pluto (gen. Plutonis) + -ic
Of deep igneous or magmatic origin: plutonic rocks.
Origin of plutonicFrom Latin Pl&umacron;t&omacron;, Pl&umacron;t&omacron;n-, Pluto; see Pluto.
From French plutonique (“of or pertaining to Pluto, the underworld, interior of the earth")