Hertzian wave[hûrtˈsē-ən, hĕrtˈ-]
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
An electromagnetic wave, usually of radio frequency, produced by the oscillation of electricity in a conductor.
Origin: After Heinrich Rudolf Hertz.