hornblendePronunciation: /ˈhɔːnblɛnd/Definition of hornblende noun [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. Origin: late 18th century: from German, from Horn 'horn' + blende (see blende)hornblende in other Oxford dictionaries Definition of hornblende in the US English dictionary
