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Pronunciation varies by accent · noun
A sealed capsule, internally coated with a phosphor and filled with a tritium whose beta decay causes the phosphor to glow..
Use betalight when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Betalight means A sealed capsule, internally coated with a phosphor and filled with a tritium whose beta decay causes the phosphor to glow..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use betalight where its definition matches the intended context.
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