transponder
noun
- airborne radio transponder used to transmit specific aircraft information in response to interrogation
Wiktionary
Pronunciation: /tɹænˈspɒn.də/ / /tɹænˈspɑn.dɚ/
noun
Etymology: Blend of transmitter + responder.
- A radar or radio transceiver that transmits some signal in response to receiving a predetermined signal.
“36 MHz transponder providing a pool of 794 reallocatable frequencies.”
“Adult animals were implanted with E-Mitter transponders intraabdominally to record body temperature and locomotor activity continuously.”