[mass noun]a dark brown, black, or green mineral consisting of a silicate of calcium, magnesium, and iron, occurring in many igneous and metamorphic rocks 普通角闪石(一种暗褐色、黑色或绿色矿石,由含钙、锰和铁的硅酸盐组成,出现于许多火成岩和变质岩中)
语源
late 18th cent.: from German, from Horn 'horn' + blende (see blende)