"delayed neutron" meaning in English

{
  "forms": [
    {
      "form": "delayed neutrons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "delayed neutron (plural delayed neutrons)",
      "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": "Nuclear physics",
          "orig": "en:Nuclear physics",
          "parents": [
            "Physics",
            "Quantum mechanics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "prompt neutron"
        }
      ],
      "glosses": [
        "A neutron produced as a result of nuclear fission which is emitted upon the radioactive decay of a fission product nucleus seconds to minutes later, rather than at the time of the initial fission event. Less than 2% of fission neutrons are delayed neutrons (the exact proportion depends on the nuclide being fissioned)."
      ],
      "id": "en-delayed_neutron-en-noun-J7Z8k~0h",
      "links": [
        [
          "nuclear physics",
          "nuclear physics"
        ],
        [
          "neutron",
          "neutron"
        ],
        [
          "nuclear fission",
          "nuclear fission"
        ],
        [
          "radioactive decay",
          "radioactive decay"
        ],
        [
          "fission product",
          "fission product"
        ],
        [
          "nucleus",
          "nucleus"
        ],
        [
          "nuclide",
          "nuclide"
        ]
      ],
      "qualifier": "nuclear physics",
      "raw_glosses": [
        "(nuclear physics) A neutron produced as a result of nuclear fission which is emitted upon the radioactive decay of a fission product nucleus seconds to minutes later, rather than at the time of the initial fission event. Less than 2% of fission neutrons are delayed neutrons (the exact proportion depends on the nuclide being fissioned)."
      ],
      "wikipedia": [
        "delayed neutron"
      ]
    }
  ],
  "word": "delayed neutron"
}

{
  "coordinate_terms": [
    {
      "word": "prompt neutron"
    }
  ],
  "forms": [
    {
      "form": "delayed neutrons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "delayed neutron (plural delayed neutrons)",
      "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:Nuclear physics"
      ],
      "glosses": [
        "A neutron produced as a result of nuclear fission which is emitted upon the radioactive decay of a fission product nucleus seconds to minutes later, rather than at the time of the initial fission event. Less than 2% of fission neutrons are delayed neutrons (the exact proportion depends on the nuclide being fissioned)."
      ],
      "links": [
        [
          "nuclear physics",
          "nuclear physics"
        ],
        [
          "neutron",
          "neutron"
        ],
        [
          "nuclear fission",
          "nuclear fission"
        ],
        [
          "radioactive decay",
          "radioactive decay"
        ],
        [
          "fission product",
          "fission product"
        ],
        [
          "nucleus",
          "nucleus"
        ],
        [
          "nuclide",
          "nuclide"
        ]
      ],
      "qualifier": "nuclear physics",
      "raw_glosses": [
        "(nuclear physics) A neutron produced as a result of nuclear fission which is emitted upon the radioactive decay of a fission product nucleus seconds to minutes later, rather than at the time of the initial fission event. Less than 2% of fission neutrons are delayed neutrons (the exact proportion depends on the nuclide being fissioned)."
      ],
      "wikipedia": [
        "delayed neutron"
      ]
    }
  ],
  "word": "delayed neutron"
}