"antiamphetamine" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "anti",
        "3": "amphetamine"
      },
      "expansion": "anti- + amphetamine",
      "name": "prefix"
    }
  ],
  "etymology_text": "From anti- + amphetamine.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "antiamphetamine (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with anti-",
          "parents": [],
          "source": "w"
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        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
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          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Biology",
          "orig": "en:Biology",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Blocking or counteracting amphetamines."
      ],
      "id": "en-antiamphetamine-en-adj-Bc04oOAD",
      "links": [
        [
          "biology",
          "biology"
        ],
        [
          "amphetamine",
          "amphetamine"
        ]
      ],
      "raw_glosses": [
        "(biology) Blocking or counteracting amphetamines."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ]
    }
  ],
  "word": "antiamphetamine"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "anti",
        "3": "amphetamine"
      },
      "expansion": "anti- + amphetamine",
      "name": "prefix"
    }
  ],
  "etymology_text": "From anti- + amphetamine.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "antiamphetamine (not comparable)",
      "name": "en-adj"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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        "English terms prefixed with anti-",
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        "Pages with 1 entry",
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        "en:Biology"
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      "glosses": [
        "Blocking or counteracting amphetamines."
      ],
      "links": [
        [
          "biology",
          "biology"
        ],
        [
          "amphetamine",
          "amphetamine"
        ]
      ],
      "raw_glosses": [
        "(biology) Blocking or counteracting amphetamines."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ]
    }
  ],
  "word": "antiamphetamine"
}