plutonite
Definitions
An igneous rock formed by the cooling and solidification of magma deep beneath the Earth's surface.
Any intrusive igneous rock, such as granite or gabbro, characterized by a coarse-grained texture.
Examples
The geologist identified the dark, coarse-grained rock as a rare form of plutonite.
Deep beneath the mountain range, the cooling magma eventually solidified into a massive formation of plutonite.