/ Dictionary / Index H Hertz effect: Meaning and Definition of Find definitions for: Hertz' effect" Pronunciation: [key] — Physics. Physics. the effect of ultraviolet radiation in lowering the sparking voltage across a spark gap: an example of photoelectric effect. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hertz Hertzian wave Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language