[{"Bold_text": "noun", "List Items": ["a device that connects into a telephone circuit and transmits a periodic signal as an indication that the conversation over the circuit is being recorded.", "a similar device attached to a free-ranging animal as an aid to learning its habits; biotelemeter.", "Also called pager .a pocket-size electronic device whose signal notifies a person of an important message, sometimes displaying the telephone number to be called."]}]