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Pronunciation varies by accent · noun
(physics) Certain members of the decay chain of thorium, mainly isotopes of radium and actinium.
Use mesothorium when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Mesothorium means (physics) Certain members of the decay chain of thorium, mainly isotopes of radium and actinium.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use mesothorium where its definition matches the intended context.
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