"rejection nucleus" meaning in English

{
  "forms": [
    {
      "form": "rejection nuclei",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "rejection nuclei"
      },
      "expansion": "rejection nucleus (plural rejection nuclei)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Botany",
          "orig": "en:Botany",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A nucleus that does not become part of the functional oosphere; a nucleus of an abortive oosphere."
      ],
      "id": "en-rejection_nucleus-en-noun-Qea32saJ",
      "links": [
        [
          "botany",
          "botany"
        ],
        [
          "functional",
          "functional"
        ],
        [
          "oosphere",
          "oosphere"
        ],
        [
          "abortive",
          "abortive"
        ]
      ],
      "raw_glosses": [
        "(botany, archaic) A nucleus that does not become part of the functional oosphere; a nucleus of an abortive oosphere."
      ],
      "tags": [
        "archaic"
      ],
      "topics": [
        "biology",
        "botany",
        "natural-sciences"
      ]
    }
  ],
  "word": "rejection nucleus"
}

{
  "forms": [
    {
      "form": "rejection nuclei",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "rejection nuclei"
      },
      "expansion": "rejection nucleus (plural rejection nuclei)",
      "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",
        "English terms with archaic senses",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Botany"
      ],
      "glosses": [
        "A nucleus that does not become part of the functional oosphere; a nucleus of an abortive oosphere."
      ],
      "links": [
        [
          "botany",
          "botany"
        ],
        [
          "functional",
          "functional"
        ],
        [
          "oosphere",
          "oosphere"
        ],
        [
          "abortive",
          "abortive"
        ]
      ],
      "raw_glosses": [
        "(botany, archaic) A nucleus that does not become part of the functional oosphere; a nucleus of an abortive oosphere."
      ],
      "tags": [
        "archaic"
      ],
      "topics": [
        "biology",
        "botany",
        "natural-sciences"
      ]
    }
  ],
  "word": "rejection nucleus"
}