(mineralogy) The rare earth thorium oxide.

plural of thoria

(mineralogy) A radioactive mineral containing thorium dioxide (ThO₂) plus oxides of uranium, lanthanum, cerium neodymium and praseodymium in smaller quantities.

(mineralogy) Describing minerals containing thorium

Third-person singular simple present indicative form of thoriate

present participle of thoriate

simple past tense and past participle of thoriate

Treated with thorium or thoria .

(transitive) To add thorium or thorium oxide to (a substance) in order to increase its thermionic flow.

plural of thorianite