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Pronunciation varies by accent · verb
To lower the speed and kinetic energy of fast neutrons in a nuclear reactor by use of a moderator, and thus increase the efficiency of fission.
Use thermalize when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Thermalize means To lower the speed and kinetic energy of fast neutrons in a nuclear reactor by use of a moderator, and thus increase the efficiency of fission.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use thermalize where its definition matches the intended context.
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