Definition of röntgenite in English:

röntgenite

(also roentgenite)

noun

Mineralogy
  • A mineral containing the rare earth elements cerium and lanthanum, typically occurring as small yellow or brown crystals. Also "röntgenite-(Ce)."

Origin

1950s. From the name of Wilhelm Conrad Röntgen + -ite.

Pronunciation

röntgenite

/ˈrʌntjənʌɪt//ˈrəːntɡənʌɪt//ˈrʌntɡənʌɪt/