noun epidote A lustrous yellow-green crystalline mineral, common in metamorphic rocks. It consists of a hydroxyl silicate of calcium, aluminum, and iron. 1
noun epidote (mineralogy) Any of a class of mixed calcium iron aluminium sorosilicates found in metamorphic rocks. 0
noun epidote a green mineral consisting of hydrated calcium iron aluminium silicate in monoclinic crystalline form: common in metamorphic rocks. Formula: Ca2(Al,Fe)3(SiO4)3(OH) 0
noun epidote hydrous calcium aluminum iron silicate, a yellowish-green to black mineral, Ca2(AlFe)3Si3O12(OH), found as monoclinic crystals, grains, or masses and sometimes used as a gem 0
