a black or greenish-black mineral of the pyroxene group, found in igneous rocks. Composition: calcium magnesium iron aluminium silicate. General formula: (Ca,Mg,Fe,Al)(Si,Al)2O6. Crystal structure: monoclinic
Derived forms
augitic (ɔːˈɡɪtɪk)
adjective
Word origin
C19: from Latin augītēs, from Greek, from augē brightness
augite in American English
(ˈɔˌdʒaɪt)
noun
any of various dark-colored, hard, monoclinic pyroxenes, (Ca, Na) (Mg, Fe, Al) (Si, Al)2O6, found in basic igneous rocks
Word origin
L augites < Gr augitēs, a precious stone < augē, sunlight, brightness < IE base *aug-, to gleam