I. ˈhe-tə-rə-ˌdīn, ˈhe-trə- adjective
Etymology: heter- + -dyne, modification of Greek dynamis power — more at dynamic
Date: 1908
: of or relating to the production of an electrical beat between two radio frequencies of which one usually is that of a received signal-carrying current and the other that of an uninterrupted current introduced into the apparatus ; also : of or relating to the production of a beat between two optical frequencies
II. transitive verb
( -dyned ; -dyn·ing )
Date: 1923
: to combine (as a radio frequency) with a different frequency so that a beat is produced