H waves
Hertzian Hertz"i*an, a. Of or pert. to the German physicist Heinrich Hertz. [Webster 1913 Suppl.]

{Hertzian telegraphy}, telegraphy by means of the Hertzian waves; wireless telegraphy.

{H. waves}, electric waves; -- so called because Hertz was the first to investigate them systematically. His apparatus consisted essentially in an oscillator for producing the waves, and a resonator for detecting them. The waves were found to have the same velocity as light, and to undergo reflection, refraction, and polarization. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

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