[{"Bold_text": "noun", "List Items": ["a hard stone, a form of silica resembling chalcedony but more opaque, less pure, and less lustrous.", "a piece of this, especially as used for striking fire.", "a chunk of this used as a primitive tool or as the core from which such a tool was struck.", "something very hard or unyielding.", "a small piece of metal, usually an iron alloy, used to produce a spark to ignite the fuel in a cigarette lighter."]}, {"Bold_text": "verb (used with object)", "List Items": ["to furnish with flint."]}, {"Bold_text": "noun", "List Items": ["Austin,1812–86,U.S. physician: founder of Bellevue and Buffalo medical colleges.", "his son Austin,1836–1915,U.S. physiologist and physician.", "a city in SE Michigan.", "Flintshire ."]}]