"T4" meaning in English

{
  "forms": [
    {
      "form": "T4s",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "T4 (plural T4s)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "thyroxine"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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          "source": "w"
        },
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Hormones",
          "orig": "en:Hormones",
          "parents": [
            "Biomolecules",
            "Biochemistry",
            "Body parts",
            "Organic compounds",
            "Biology",
            "Chemistry",
            "Body",
            "Anatomy",
            "Matter",
            "Sciences",
            "All topics",
            "Medicine",
            "Nature",
            "Fundamental",
            "Healthcare",
            "Health"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of thyroxine."
      ],
      "id": "en-T4-en-noun-ApDUJJW7",
      "links": [
        [
          "biochemistry",
          "biochemistry"
        ],
        [
          "thyroxine",
          "thyroxine#English"
        ]
      ],
      "raw_glosses": [
        "(biochemistry) Abbreviation of thyroxine."
      ],
      "related": [
        {
          "word": "T3"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ],
      "topics": [
        "biochemistry",
        "biology",
        "chemistry",
        "microbiology",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌtiː ˈfɔː/",
      "tags": [
        "Received-Pronunciation"
      ]
    },
    {
      "ipa": "/ˌti ˈfɔɹ/",
      "tags": [
        "General-American"
      ]
    },
    {
      "rhymes": "-ɔː"
    }
  ],
  "word": "T4"
}

{
  "forms": [
    {
      "form": "T4s",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "T4 (plural T4s)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "T3"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "thyroxine"
        }
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        "English countable nouns",
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        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:English/ɔː",
        "en:Hormones"
      ],
      "glosses": [
        "Abbreviation of thyroxine."
      ],
      "links": [
        [
          "biochemistry",
          "biochemistry"
        ],
        [
          "thyroxine",
          "thyroxine#English"
        ]
      ],
      "raw_glosses": [
        "(biochemistry) Abbreviation of thyroxine."
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ],
      "topics": [
        "biochemistry",
        "biology",
        "chemistry",
        "microbiology",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌtiː ˈfɔː/",
      "tags": [
        "Received-Pronunciation"
      ]
    },
    {
      "ipa": "/ˌti ˈfɔɹ/",
      "tags": [
        "General-American"
      ]
    },
    {
      "rhymes": "-ɔː"
    }
  ],
  "word": "T4"
}