/ Dictionary / Index D de Broglie equation: Meaning and Definition of Find definitions for: de Bro'glie equa"tion Pronunciation: [key] — Physics. Physics. the postulate of wave mechanics that a particle of mass m moving at a velocity v will have the properties of a wave of wavelength h/mv where h is Planck's constant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. de Broglie de Broglie wave Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language