[{"Bold_text": "adjective", "List Items": ["Metallurgy.chemically unstable in the absence of certain conditions that would induce stability, but not liable to spontaneous transformation.", "Also Physics, Chemistry.pertaining to a body or system existing at an energy levelmet?asta?ble state?above that of a more stable and requiring the addition of a small amount of energy to induce a transition to the more stable ."]}]