| a silicate mineral, chiefly of calcium, magnesium, iron, and aluminum: a dark-green to black variety of monoclinic pyroxene, characteristic of basic rocks. |
) sunlight + -ītis, fem. of -ītēs -ite 1 
| augite (ô'jīt') Pronunciation Key
A glassy, dark-green to black variety of pyroxene. Chemical formula: (Ca,Na)(Mg,Fe,Al)(Si,Al)2O6. |