DICT.TW Dictionary Taiwan

 het·ero·dyne /ˈhɛtərəˌdaɪn, ˈhɛtrə-/
 (a.)[無線電] 外差式的

 heterodyne
 外差

 heterodyne
      adj : of or relating to the the beat produced by heterodyning two
            oscillations
      v : 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