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Hint: Question mark (?) is a wildcard. Question mark substitutes one character.
English
noun
:
positron
1.
positron
(object)
an elementary particle with positive charge; interaction of a positron and an electron results in annihilation
Synonyms
antielectron
Broader (hypernym)
antilepton
Based on WordNet 3.0 copyright © Princeton University.
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Orcapia v/Per Bang
. English edition:
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.
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