Transponder (noun)

A device that automatically transmits a response to a received signal, especially a radio or radar signal.

Origin:

Late 20th century: from trans- "across" + responder.

Examples:

1. The transponder was used to identify and track aircraft in flight.
2. The transponder was a crucial component of many navigation and communication systems.
3. The transponder was able to send and receive signals over long distances, making it ideal for use in space.
4. The transponder was used in a variety of applications, including air traffic control, satellite communication, and military operations.
5. The transponder was an important tool for ensuring safety and reliability in many critical industries, such as aviation and shipping.