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pentaquark

/ (ˈpɛntəˌkwɑːk) /
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noun
physics a postulated subatomic particle consisting of four quarks and one antiquark, thought not to exist in actuality
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Word Origin for pentaquark

C21
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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