Definition of Zsigmondy, Richard Adolf in English:
Zsigmondy, Richard Adolf
proper nounˈʃɪɡmɒndiˈZHiɡˌmôndē
(1865–1929), Austrian-born German chemist. He investigated the properties of various colloidal solutions and invented the ultramicroscope for counting colloidal particles. Nobel Prize for Chemistry (1925).