Noun
English Wikipedia has an article on:naumanniteWikipedia
naumannite (uncountable)
(mineralogy) A mineral form of silver selenide (Ag2Se)
Naumannite (plural Naumannites)
(historical) A supporter of Werner Naumann (1909–1982), State Secretary in Joseph Goebbels' Ministry of Public Enlightenment and Propaganda during the Third Reich.