from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, relating to, or being a form of radio reception in which the frequency of an incoming radio signal is mixed with a locally generated signal and converted to an intermediate frequency in order to facilitate amplification and the rejection of unwanted signals.
- n. A superheterodyne radio receiver.
super(sonic) + heterodyne.(American Heritage® Dictionary of the English Language, Fourth Edition)
From super- + heterodyne. (Wiktionary)