[{"Bold_text": "noun", "List Items": ["anything that resonates.", "an appliance for increasing sound by resonance.", "an instrument for detecting the presence of a particular frequency by means of resonance.", "Electronics.a hollow enclosure cavity resonator made of conducting material of such dimensions that electromagnetic radiation electromagnetic radiationof a certain frequency will resonate .any circuit having this frequency characteristic.", "a hollow enclosure cavity resonator made of conducting material of such dimensions that electromagnetic radiation electromagnetic radiationof a certain frequency will resonate .", "any circuit having this frequency characteristic."]}]