Transponder

//tɹænˈspɒn.də// noun

Definitions

Noun
  1. 1
    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."

  2. 2
    electrical device designed to receive a specific signal and automatically transmit a specific reply wordnet

Etymology

Blend of transmitter + responder.

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