superheterodyne

adjective

su·​per·​het·​ero·​dyne ˌsü-pər-ˈhe-tə-rə-ˌdīn 

-ˈhe-trə-

: used in or being a radio receiver in which an incoming signal is mixed with a locally generated frequency to produce an ultrasonic signal that is then rectified, amplified, and rectified again to reproduce the sound

superheterodyne noun

Word History

Etymology

supersonic + heterodyne

First Known Use

1920, in the meaning defined above