pyroxenite

This term is a specialized geological descriptor used primarily in petrology to categorize specific intrusive igneous rocks. It carries a neutral, scientific connotation and is restricted to academic, technical, or professional contexts involving mineralogy and earth sciences.

Because it refers to a specific type of rock material, it is typically treated as an uncountable mass noun when discussing the substance itself. However, it can be used as a countable noun when referring to a specific specimen or a distinct variety of the rock.