Zsigmondy

noun

1. Rich·ard [rikh-ahrt] /ˈrɪx ɑrt/, 1865–1929, German chemist, born in Austria: Nobel prize 1925.

noun

1. Richard Adolf (ˈrɪçart ˈaːdɔlf). 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 1925