[{"Bold_text": "noun", "List Items": ["Geometry.a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end.a straight line passing from side to side of any figure or body, through its center.", "a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end.", "a straight line passing from side to side of any figure or body, through its center.", "the length of such a line.", "the width of a circular or cylindrical object."]}]