Definition of pentaquark in English:

pentaquark

Syllabification: pen·ta·quark
Pronunciation: /ˈpen(t)əˌkwärk
 
/

noun

Physics
A baryon consisting of four quarks and an antiquark.
More example sentences
  • The elusive pentaquark - comprising five quarks - failed to put in an appearance during experiments at the Accelerator Facility in Virginia specifically carried out to search for the little blighter.
  • Like recently discovered extrasolar planets that reveal new planetary configurations to astronomers, pentaquarks are alerting physicists to possible new sub-atomic arrangements, he adds.
  • Quarks come in oddly named ‘flavors,’ and all the new species include two strange, one anti-up, and either an up or a down quark among the five (the pentaquarks discovered last spring all had two ups, two downs, and one anti-strange).

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Pronunciation: əˈnastrəfi
noun
the inversion of the usual order of words...