"duopolism" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "duopoly",
        "3": "ism"
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      "expansion": "duopoly + -ism",
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  ],
  "etymology_text": "From duopoly + -ism.",
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      "expansion": "duopolism (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "English entries with incorrect language header",
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      ],
      "coordinate_terms": [
        {
          "word": "monopolism"
        }
      ],
      "examples": [
        {
          "ref": "2006, Susan Hayward, French National Cinema, Routledge:",
          "text": "This will not lead to a simplistic duopolism, however, for the very reason that cinemas tend to cross-fertilise and recuperate cinematic practices the one from the other.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A doctrine supporting a duopoly."
      ],
      "id": "en-duopolism-en-noun-fLIGQm6a",
      "links": [
        [
          "doctrine",
          "doctrine"
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        [
          "duopoly",
          "duopoly"
        ]
      ],
      "raw_glosses": [
        "(rare) A doctrine supporting a duopoly."
      ],
      "tags": [
        "rare",
        "uncountable"
      ]
    }
  ],
  "word": "duopolism"
}

{
  "coordinate_terms": [
    {
      "word": "monopolism"
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  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "duopoly",
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      "expansion": "duopoly + -ism",
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  ],
  "etymology_text": "From duopoly + -ism.",
  "head_templates": [
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      "expansion": "duopolism (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "ref": "2006, Susan Hayward, French National Cinema, Routledge:",
          "text": "This will not lead to a simplistic duopolism, however, for the very reason that cinemas tend to cross-fertilise and recuperate cinematic practices the one from the other.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A doctrine supporting a duopoly."
      ],
      "links": [
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          "duopoly",
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        ]
      ],
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        "(rare) A doctrine supporting a duopoly."
      ],
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        "rare",
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  "word": "duopolism"
}