Quark-plus-antiquark particles Crossword Clue
6 letters · New York Times · Thursday, May 28, 2015 · 41-Down
Appeared in 1 New York Times Crossword: Thursday, May 28, 2015.
Exact puzzle match · New York Times · May 28, 2015 · 41-Down · 6 letters
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What does this clue mean?
an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0
noun
WordNet® (Princeton University)
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