/ Dictionary / Index D de Broglie wave: Meaning and Definition of Find definitions for: de Bro'glie wave" Pronunciation: [key] — Physics. Physics. a hypothetical wave associated with the motion of a particle of atomic or subatomic size that describes effects such as the diffraction of beams of particles by crystals. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. de Broglie equation débrouillard* Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language