HETERODYNE
heterodyne
(adjective) of or relating to the beat produced by heterodyning two oscillations
heterodyne
(verb) combine (a radio frequency wave) with a locally generated wave of a different frequency so as to produce a new frequency equal to the sum or the difference between the two
Source: WordNet® 3.1
Etymology
Adjective
heterodyne (not comparable)
Of two oscillations: having two slightly different frequencies such that, when combined, they produce a beat
Noun
heterodyne (plural heterodynes)
The beat so produced
Either the sum or difference of the two oscillations
Verb
heterodyne (third-person singular simple present heterodynes, present participle heterodyning, simple past and past participle heterodyned)
To produce heterodyne interference in a radio
To change the frequency of a signal by such a process
Source: Wiktionary