[{"Bold_text": "noun", "List Items": ["any of various devices for measuring minute distances, angles, etc., as in connection with a telescope or microscope.", "Also called mike ..a precision instrument with a spindle moved by a finely threaded screw, for the measurement of thicknesses and short lengths, commonly used by machinists for turning shafts or boring holes."]}, {"Bold_text": "noun", "List Items": ["micron(def1) micron(def1)."]}]