[{"Bold_text": "noun", "List Items": ["an electromagnetic wave electromagnetic waveof extremely high frequency, 1 GH3or more, and having wavelengths of from 1 millimeter to 30 centimeters.", "microwave oven microwave oven."]}, {"Bold_text": "verb (used without object)", "List Items": ["to use a microwave oven."]}, {"Bold_text": "verb (used with object)", "List Items": ["to cook, defrost, or otherwise prepare in a microwave oven."]}]