[{"Bold_text": "noun", "List Items": ["a very hard rock, anciently quarried in Egypt, having a dark, purplish-red groundmass containing small crystals of feldspar.", "Petrology.any igneous rock containing coarse crystals, as phenocrysts, in a finer-grained groundmass."]}, {"Bold_text": "noun", "List Items": ["Malchus,a.d. c233–c304, Greek philosopher."]}]