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Hint: Question mark (?) is a wildcard. Question mark substitutes one character.
English
noun
:
J particle
1.
J particle
(object)
a neutral meson with a large mass
Synonyms
psi particle
Broader (hypernym)
meson
,
mesotron
Based on WordNet 3.0 copyright © Princeton University.
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Orcapia v/Per Bang
. English edition:
Peter Jensen
.
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