"☡" meaning in Translingual

{
  "etymology_text": "In mathematics, first introduced by Nicolas Bourbaki in their treatise Éléments de mathématique.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "☡",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Computer science",
          "orig": "mul:Computer science",
          "parents": [
            "Computing",
            "Sciences",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Mathematics",
          "orig": "mul:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Used to mark an especially difficult passage or proof in a textbook."
      ],
      "id": "en-☡-mul-symbol-iATDskhZ",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "computer science",
          "computer science"
        ]
      ],
      "raw_glosses": [
        "(mathematics, computer science) Used to mark an especially difficult passage or proof in a textbook."
      ],
      "topics": [
        "computer",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "science",
        "sciences"
      ],
      "wikipedia": [
        "Bourbaki dangerous bend symbol",
        "Nicolas Bourbaki",
        "Éléments de mathématique"
      ]
    }
  ],
  "word": "☡"
}

{
  "etymology_text": "In mathematics, first introduced by Nicolas Bourbaki in their treatise Éléments de mathématique.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "☡",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual symbols",
        "mul:Computer science",
        "mul:Mathematics"
      ],
      "glosses": [
        "Used to mark an especially difficult passage or proof in a textbook."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "computer science",
          "computer science"
        ]
      ],
      "raw_glosses": [
        "(mathematics, computer science) Used to mark an especially difficult passage or proof in a textbook."
      ],
      "topics": [
        "computer",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "science",
        "sciences"
      ],
      "wikipedia": [
        "Bourbaki dangerous bend symbol",
        "Nicolas Bourbaki",
        "Éléments de mathématique"
      ]
    }
  ],
  "word": "☡"
}