"antiestrogen" meaning in English

{
  "etymology_templates": [
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      "args": {
        "1": "en",
        "2": "anti",
        "3": "estrogen"
      },
      "expansion": "anti- + estrogen",
      "name": "prefix"
    }
  ],
  "etymology_text": "anti- + estrogen",
  "forms": [
    {
      "form": "antiestrogens",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "antiestrogen (plural antiestrogens)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "kind": "other",
          "name": "English terms prefixed with anti-",
          "parents": [],
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          "kind": "topical",
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          "name": "Pharmacology",
          "orig": "en:Pharmacology",
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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Steroids",
          "orig": "en:Steroids",
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            "Matter",
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            "Sciences",
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          "source": "w"
        }
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      "derived": [
        {
          "word": "fulvestrant"
        }
      ],
      "examples": [
        {
          "ref": "2008 June 17, Jane E. Brody, “Cancer as a Disease, Not a Death Sentence”, in New York Times",
          "text": "Dr. Esteva described a breast cancer patient first treated with a mastectomy and the antiestrogen tamoxifen in 1995.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A substance that blocks the production or utilization of estrogens, or inhibits their effects."
      ],
      "id": "en-antiestrogen-en-noun-gjL5pujQ",
      "links": [
        [
          "pharmacology",
          "pharmacology"
        ],
        [
          "estrogen",
          "estrogen"
        ]
      ],
      "raw_glosses": [
        "(pharmacology) A substance that blocks the production or utilization of estrogens, or inhibits their effects."
      ],
      "topics": [
        "medicine",
        "pharmacology",
        "sciences"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "kàng-cíjīsù",
          "sense": "a substance that blocks estrogens",
          "word": "抗雌激素"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "a substance that blocks estrogens",
          "tags": [
            "masculine"
          ],
          "word": "antiestrógeno"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "a substance that blocks estrogens",
          "tags": [
            "Portugal",
            "masculine"
          ],
          "word": "antiestrogénio"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "a substance that blocks estrogens",
          "tags": [
            "Brazil",
            "masculine"
          ],
          "word": "antiestrogênio"
        }
      ],
      "wikipedia": [
        "antiestrogen"
      ]
    }
  ],
  "word": "antiestrogen"
}

{
  "derived": [
    {
      "word": "fulvestrant"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "anti",
        "3": "estrogen"
      },
      "expansion": "anti- + estrogen",
      "name": "prefix"
    }
  ],
  "etymology_text": "anti- + estrogen",
  "forms": [
    {
      "form": "antiestrogens",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "antiestrogen (plural antiestrogens)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "ref": "2008 June 17, Jane E. Brody, “Cancer as a Disease, Not a Death Sentence”, in New York Times",
          "text": "Dr. Esteva described a breast cancer patient first treated with a mastectomy and the antiestrogen tamoxifen in 1995.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A substance that blocks the production or utilization of estrogens, or inhibits their effects."
      ],
      "links": [
        [
          "pharmacology",
          "pharmacology"
        ],
        [
          "estrogen",
          "estrogen"
        ]
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      "raw_glosses": [
        "(pharmacology) A substance that blocks the production or utilization of estrogens, or inhibits their effects."
      ],
      "topics": [
        "medicine",
        "pharmacology",
        "sciences"
      ],
      "wikipedia": [
        "antiestrogen"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "kàng-cíjīsù",
      "sense": "a substance that blocks estrogens",
      "word": "抗雌激素"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "a substance that blocks estrogens",
      "tags": [
        "masculine"
      ],
      "word": "antiestrógeno"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "a substance that blocks estrogens",
      "tags": [
        "Portugal",
        "masculine"
      ],
      "word": "antiestrogénio"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "a substance that blocks estrogens",
      "tags": [
        "Brazil",
        "masculine"
      ],
      "word": "antiestrogênio"
    }
  ],
  "word": "antiestrogen"
}