"2.5D" meaning in English

{
  "head_templates": [
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      "args": {
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      "expansion": "2.5D (not comparable)",
      "name": "en-adj"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "name": "English retronyms",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Computer graphics",
          "orig": "en:Computer graphics",
          "parents": [
            "Computing",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Video games",
          "orig": "en:Video games",
          "parents": [
            "Games",
            "Mass media",
            "Software",
            "Recreation",
            "Culture",
            "Media",
            "Computing",
            "Human activity",
            "Society",
            "Communication",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Halfway between two-dimensional and three-dimensional; typically limited to a two-dimensional plane with only limited access to the third dimension."
      ],
      "id": "en-2.5D-en-adj-dx4tXSUg",
      "links": [
        [
          "video game",
          "video game"
        ],
        [
          "computer graphics",
          "computer graphics"
        ],
        [
          "two-dimensional",
          "two-dimensional"
        ],
        [
          "three-dimensional",
          "three-dimensional"
        ]
      ],
      "raw_glosses": [
        "(video games, computer graphics) Halfway between two-dimensional and three-dimensional; typically limited to a two-dimensional plane with only limited access to the third dimension."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "computer-graphics",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences",
        "video-games"
      ],
      "wikipedia": [
        "2.5D"
      ]
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  ],
  "word": "2.5D"
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      "expansion": "2.5D (not comparable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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    {
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        "English adjectives",
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        "en:Computer graphics",
        "en:Video games"
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      "glosses": [
        "Halfway between two-dimensional and three-dimensional; typically limited to a two-dimensional plane with only limited access to the third dimension."
      ],
      "links": [
        [
          "video game",
          "video game"
        ],
        [
          "computer graphics",
          "computer graphics"
        ],
        [
          "two-dimensional",
          "two-dimensional"
        ],
        [
          "three-dimensional",
          "three-dimensional"
        ]
      ],
      "raw_glosses": [
        "(video games, computer graphics) Halfway between two-dimensional and three-dimensional; typically limited to a two-dimensional plane with only limited access to the third dimension."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "computer-graphics",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences",
        "video-games"
      ],
      "wikipedia": [
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      ]
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  ],
  "word": "2.5D"
}