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Pronunciation varies by accent · noun
(mineralogy) A radioactive mineral containing thorium dioxide (ThO₂) plus oxides of uranium, lanthanum, cerium neodymium and praseodymium in smaller quantities..
Use thorianite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Thorianite means (mineralogy) A radioactive mineral containing thorium dioxide (ThO₂) plus oxides of uranium, lanthanum, cerium neodymium and praseodymium in smaller quantities..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use thorianite where its definition matches the intended context.
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