de Broglie (French d? br?j) n1. (Biography) Prince Louis Victor (lwi vikt?r). 1892?1987, French physicist, noted for his research in quantum mechanics and his development of wave mechanics: Nobel prize for physics 19292. (Biography) his brother, Maurice (m?ris), Duc de Broglie. 1875?1960, French physicist, noted for his research into X-ray spectraCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014de Bro?glie (d??br??, bro?g?li, bro?l?ye?) Louis Vic?tor 1892?1987, French physicist: Nobel prize 1929. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.