"upsilon particle" meaning in English

{
  "forms": [
    {
      "form": "upsilon particles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "upsilon particle (plural upsilon particles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Subatomic particles",
          "orig": "en:Subatomic particles",
          "parents": [
            "Matter",
            "Particle physics",
            "Chemistry",
            "Nature",
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Any of a number of bound states of a heavy quark and its antiquark, especially that formed from a bottom quark and an anti-bottom quark."
      ],
      "id": "en-upsilon_particle-en-noun-59aPF7aj",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "bound state",
          "bound state"
        ],
        [
          "quark",
          "quark"
        ],
        [
          "antiquark",
          "antiquark"
        ],
        [
          "bottom quark",
          "bottom quark"
        ],
        [
          "anti-bottom quark",
          "anti-bottom quark"
        ]
      ],
      "raw_glosses": [
        "(physics) Any of a number of bound states of a heavy quark and its antiquark, especially that formed from a bottom quark and an anti-bottom quark."
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "translations": [
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "ípsilon-častíca",
          "sense": "bound state",
          "tags": [
            "feminine"
          ],
          "word": "и́псилон-части́ца"
        }
      ],
      "wikipedia": [
        "upsilon particle"
      ]
    }
  ],
  "word": "upsilon particle"
}

{
  "forms": [
    {
      "form": "upsilon particles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "upsilon particle (plural upsilon particles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Subatomic particles"
      ],
      "glosses": [
        "Any of a number of bound states of a heavy quark and its antiquark, especially that formed from a bottom quark and an anti-bottom quark."
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "bound state",
          "bound state"
        ],
        [
          "quark",
          "quark"
        ],
        [
          "antiquark",
          "antiquark"
        ],
        [
          "bottom quark",
          "bottom quark"
        ],
        [
          "anti-bottom quark",
          "anti-bottom quark"
        ]
      ],
      "raw_glosses": [
        "(physics) Any of a number of bound states of a heavy quark and its antiquark, especially that formed from a bottom quark and an anti-bottom quark."
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "wikipedia": [
        "upsilon particle"
      ]
    }
  ],
  "translations": [
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "ípsilon-častíca",
      "sense": "bound state",
      "tags": [
        "feminine"
      ],
      "word": "и́псилон-части́ца"
    }
  ],
  "word": "upsilon particle"
}