1. a large body of igneous rock that formed deep underground from cooled magma
Usage: geology

Examples

• The granite pluton was exposed after millions of years of erosion.
• Geologists studied the mineral composition of the ancient pluton.
• The mountain range contains several large plutons formed during volcanic activity.
• Mining operations revealed a pluton rich in valuable minerals.
• The pluton’s crystalline structure indicates it cooled slowly underground.
• Researchers mapped the boundaries of the massive pluton using seismic data.