VariousWords beta
Related Terms:
Noun
Definition: A radioactive mineral containing thorium dioxide (ThO₂) plus oxides of uranium, lanthanum, cerium neodymium and praseodymium in smaller quantities.
VariousWords beta
Definition: A radioactive mineral containing thorium dioxide (ThO₂) plus oxides of uranium, lanthanum, cerium neodymium and praseodymium in smaller quantities.