Pronunciation: (het'ur-u-dīn"), [key]
—adj., v., -dyned, -dyn•ing. Radio.
noting or pertaining to a method of changing the frequency of an incoming radio signal by adding it to a signal generated within the receiver to produce fluctuations or beats of a frequency equal to the difference between the two signals.
to produce a heterodyne effect.
to mix (a frequency) with a different frequency so as to achieve a heterodyne effect.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.