from
The Collaborative International Dictionary of English v.0.48
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.]