the world > the earth > minerals > types of mineral > silicates > inosilicates single chain > [noun] > pyroxene > clinopyroxenes > acmite or aegerite (3)
An iron-containing mineral of the pyroxene group, which occurs as dark green, pointed crystals.
An iron-containing mineral of the clinopyroxene group which is characteristic of many alkaline igneous rocks (see also quot. 1992); also called aeg…