Definition of uranopilite in English:

uranopilite

noun

Chemistry Mineralogy
  • A bright yellow mineral found as an alteration product on uranium ores, typically as crusts or aggregates of slender crystals.

Origin

Late 19th century; earliest use found in American Journal of Science. From urano- + ancient Greek πῖλος wool, felt + -ite, after German Uranopilit, so called on account of its appearance.