"halo nucleus" meaning in English

{
  "forms": [
    {
      "form": "halo nuclei",
      "tags": [
        "plural"
      ]
    }
  ],
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        "1": "halo nuclei"
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      "expansion": "halo nucleus (plural halo nuclei)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Nuclear physics",
          "orig": "en:Nuclear physics",
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            "Physics",
            "Quantum mechanics",
            "Sciences",
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            "Fundamental"
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Radioactivity",
          "orig": "en:Radioactivity",
          "parents": [
            "Nuclear physics",
            "Radiation",
            "Physics",
            "Quantum mechanics",
            "Energy",
            "Sciences",
            "Nature",
            "All topics",
            "Fundamental"
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        }
      ],
      "glosses": [
        "An atomic nucleus whose radius is appreciably larger than that predicted by the liquid drop model (wherein the nucleus is assumed to be a sphere of constant density)."
      ],
      "id": "en-halo_nucleus-en-noun-Yyjaz4NV",
      "links": [
        [
          "nuclear physics",
          "nuclear physics"
        ],
        [
          "atomic nucleus",
          "atomic nucleus"
        ],
        [
          "radius",
          "radius"
        ],
        [
          "sphere",
          "sphere"
        ],
        [
          "density",
          "density"
        ]
      ],
      "qualifier": "nuclear physics",
      "raw_glosses": [
        "(nuclear physics) An atomic nucleus whose radius is appreciably larger than that predicted by the liquid drop model (wherein the nucleus is assumed to be a sphere of constant density)."
      ],
      "wikipedia": [
        "halo nucleus"
      ]
    }
  ],
  "word": "halo nucleus"
}

{
  "forms": [
    {
      "form": "halo nuclei",
      "tags": [
        "plural"
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  ],
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English countable nouns",
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        "en:Nuclear physics",
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      ],
      "glosses": [
        "An atomic nucleus whose radius is appreciably larger than that predicted by the liquid drop model (wherein the nucleus is assumed to be a sphere of constant density)."
      ],
      "links": [
        [
          "nuclear physics",
          "nuclear physics"
        ],
        [
          "atomic nucleus",
          "atomic nucleus"
        ],
        [
          "radius",
          "radius"
        ],
        [
          "sphere",
          "sphere"
        ],
        [
          "density",
          "density"
        ]
      ],
      "qualifier": "nuclear physics",
      "raw_glosses": [
        "(nuclear physics) An atomic nucleus whose radius is appreciably larger than that predicted by the liquid drop model (wherein the nucleus is assumed to be a sphere of constant density)."
      ],
      "wikipedia": [
        "halo nucleus"
      ]
    }
  ],
  "word": "halo nucleus"
}