transponder


tran·spon·der

noun \tran(t)-ˈspän-dər\

: a device that receives a radio signal and sends out a signal in response and that is used especially to show the location of something (such as an airplane)

Full Definition of TRANSPONDER

:  a radio or radar set that upon receiving a designated signal emits a radio signal of its own and that is used especially for the detection, identification, and location of objects and in satellites for relaying communications signals

Origin of TRANSPONDER

transmitter + responder
First Known Use: circa 1944

Rhymes with TRANSPONDER

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