uraninite

u·ra·ni·nite  (y-rn-nt)

n.

A complex brownish-black mineral, UO₂, forming the chief ore of uranium and containing variable amounts of radium, lead, thorium, and other elements. It is isomorphous with thorianite.

---

[German Uranin (from New Latin ranium, uranium; see uranium) + -ite¹.]

Thesaurus

Noun

1.

uraninite - a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore pitchblende atomic number 92, uranium, U - a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons uranium ore - any ore from which uranium can be extracted