[{"Bold_text": "noun", "List Items": ["a coarse-grained igneous rock composed chiefly of orthoclase and albite feldspars and of quartz, usually with lesser amounts of one or more other minerals, as mica, hornblende, or augite.", "anything compared to this rock in great hardness, firmness, or durability."]}, {"Bold_text": "noun", "List Items": ["ice(def4) ice(def4)."]}]