"hard science fiction" meaning in English

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      "expansion": "Coined by American critic P. Schuyler Miller in 1957",
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  "etymology_text": "Coined by American critic P. Schuyler Miller in 1957.",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
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          "kind": "topical",
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          "name": "Science fiction",
          "orig": "en:Science fiction",
          "parents": [
            "Fiction",
            "Speculative fiction",
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            "Genres",
            "Art",
            "Entertainment",
            "Culture",
            "Society",
            "All topics",
            "Fundamental"
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        }
      ],
      "glosses": [
        "A subgenre of science fiction that focuses on technical detail and scientific accuracy."
      ],
      "hypernyms": [
        {
          "word": "science fiction"
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      ],
      "id": "en-hard_science_fiction-en-noun-dVvE94uj",
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          "subgenre",
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        [
          "science fiction",
          "science fiction#English"
        ],
        [
          "technical",
          "technical"
        ],
        [
          "detail",
          "detail"
        ],
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          "scientific",
          "scientific"
        ],
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          "accuracy",
          "accuracy"
        ]
      ],
      "raw_glosses": [
        "(science fiction) A subgenre of science fiction that focuses on technical detail and scientific accuracy."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "literature",
        "media",
        "publishing",
        "science-fiction"
      ]
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  ],
  "word": "hard science fiction"
}

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  "lang_code": "en",
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        "(science fiction) A subgenre of science fiction that focuses on technical detail and scientific accuracy."
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  "word": "hard science fiction"
}