Definition of rooseveltite in English:

rooseveltite

noun

Mineralogy
  • A rare mineral found as a white or grey crust in veinlets of cassiterite in Bolivia, Germany, and elsewhere.

Origin

1940s; earliest use found in American Mineralogist. From Spanish rooseveltita from the name of Franklin Delano Roosevelt + -ita.

Pronunciation

rooseveltite

/ˈrəʊzəˌvɛltʌɪt/