Pyroxene

//paɪˈɹɑk.sin// noun

Definitions

Noun
  1. 1
    Any of a group of crystalline minerals containing silicates of iron, magnesium and calcium.

    "By the pathside, there are occasional large boulders that shown black crystals the size of a fingernail; these are pyroxene minerals that had time to crystallise out deep within the chamber of liquid rock – or magma – beneath the volcano."

  2. 2
    any of a group of crystalline silicate mineral common in igneous and metamorphic rocks wordnet

Etymology

From French pyroxène, from pyro- + Ancient Greek ξένος (xénos, “stranger”).

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