"bifunctional chelator" meaning in English

{
  "forms": [
    {
      "form": "bifunctional chelators",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "bifunctional chelator (plural bifunctional chelators)",
      "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": "Pharmacy",
          "orig": "en:Pharmacy",
          "parents": [
            "Medicine",
            "Pharmacology",
            "Biology",
            "Sciences",
            "Biochemistry",
            "All topics",
            "Chemistry",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A chemical chelator that: 1) secures a metal ion (often radioactive) and 2) forms a linkage (bond) between the complex and the targeting vector (e.g. a tumour targeting protein)."
      ],
      "id": "en-bifunctional_chelator-en-noun-qWR9wrvV",
      "links": [
        [
          "pharmacy",
          "pharmacy"
        ]
      ],
      "qualifier": "pharmacy",
      "raw_glosses": [
        "(pharmacy) A chemical chelator that: 1) secures a metal ion (often radioactive) and 2) forms a linkage (bond) between the complex and the targeting vector (e.g. a tumour targeting protein)."
      ]
    }
  ],
  "word": "bifunctional chelator"
}

{
  "forms": [
    {
      "form": "bifunctional chelators",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "bifunctional chelator (plural bifunctional chelators)",
      "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:Pharmacy"
      ],
      "glosses": [
        "A chemical chelator that: 1) secures a metal ion (often radioactive) and 2) forms a linkage (bond) between the complex and the targeting vector (e.g. a tumour targeting protein)."
      ],
      "links": [
        [
          "pharmacy",
          "pharmacy"
        ]
      ],
      "qualifier": "pharmacy",
      "raw_glosses": [
        "(pharmacy) A chemical chelator that: 1) secures a metal ion (often radioactive) and 2) forms a linkage (bond) between the complex and the targeting vector (e.g. a tumour targeting protein)."
      ]
    }
  ],
  "word": "bifunctional chelator"
}