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Lecher wires

American  
[lekh-er] / ˈlɛx ər /
Or lecher wires

plural noun

Electricity.
  1. parallel wires of such length and terminations that the system will resonate, producing standing waves, if the frequency of the excitation is correct.


Etymology

Origin of Lecher wires

1925–30; named after E. Lecher (died 1926), Austrian physicist