n.
Pronunciation: ˌ sü-p ə r- ' he-t ə -r ə - ˌ d ī n, - ' he-tr ə -
Function: adjective
Etymology: super sonic + heterodyne
Date: 1922
: 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