Zsigmondy (German ????m?ndi) n (Biography) Richard Adolf (?r?çart ?a?d?lf). 1865?1929, German chemist, born in Austria, noted for his work on colloidal particles and, with H. Siedentopf, his introduction (1903) of the ultramicroscope: Nobel prize for chemistry 1925Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Zsig?mon?dy (???g m?n di) n. Ri?chard (?r?x ?rt) 1865?1929, German chemist, born in Austria: Nobel prize 1925. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.