heterodyne

adjective
het·ero·dyne | \ˈhe-tə-rə-ˌdīn, ˈhe-trə-\

Definition of heterodyne 

(Entry 1 of 2)

: 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

heterodyne

verb
heterodyned; heterodyning

Definition of heterodyne (Entry 2 of 2)

transitive verb

: to combine (something, such as a radio frequency) with a different frequency so that a beat is produced

First Known Use of heterodyne

Adjective

1908, in the meaning defined above

Verb

1923, in the meaning defined above

History and Etymology for heterodyne

Adjective

heter- + -dyne, modification of Greek dynamis power — more at dynamic

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The first known use of heterodyne was in 1908

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