"Gδ" meaning in All languages combined

{
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "de",
        "3": "Gebiet",
        "4": "",
        "5": "neighborhood"
      },
      "expansion": "German Gebiet (“neighborhood”)",
      "name": "der"
    },
    {
      "args": {
        "1": "de",
        "2": "Durchschnitt",
        "3": "",
        "4": "intersection"
      },
      "expansion": "Durchschnitt (“intersection”)",
      "name": "m"
    }
  ],
  "etymology_text": "From German Gebiet (“neighborhood”) for 'G' and German Durchschnitt (“intersection”) for the 'δ'.",
  "forms": [
    {
      "form": "G_δ",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol",
        "head": "G_δ"
      },
      "expansion": "G_δ",
      "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": "other",
          "name": "Translingual entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual terms written in multiple scripts",
          "parents": [
            "Terms written in multiple scripts",
            "Terms by orthographic property",
            "Terms by lexical property"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Mathematical analysis",
          "orig": "mul:Mathematical analysis",
          "parents": [
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Measure theory",
          "orig": "mul:Measure theory",
          "parents": [
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Topology",
          "orig": "mul:Topology",
          "parents": [
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A countable intersection of open sets."
      ],
      "hypernyms": [
        {
          "word": "Borel set"
        }
      ],
      "id": "en-Gδ-mul-symbol-QN0opebi",
      "links": [
        [
          "mathematical analysis",
          "mathematical analysis"
        ],
        [
          "topology",
          "topology"
        ],
        [
          "countable",
          "countable"
        ],
        [
          "intersection",
          "intersection"
        ],
        [
          "open set",
          "open set"
        ]
      ],
      "raw_glosses": [
        "(mathematical analysis, topology) A countable intersection of open sets."
      ],
      "topics": [
        "mathematical-analysis",
        "mathematics",
        "sciences",
        "topology"
      ],
      "wikipedia": [
        "Gδ set"
      ]
    }
  ],
  "word": "Gδ"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "de",
        "3": "Gebiet",
        "4": "",
        "5": "neighborhood"
      },
      "expansion": "German Gebiet (“neighborhood”)",
      "name": "der"
    },
    {
      "args": {
        "1": "de",
        "2": "Durchschnitt",
        "3": "",
        "4": "intersection"
      },
      "expansion": "Durchschnitt (“intersection”)",
      "name": "m"
    }
  ],
  "etymology_text": "From German Gebiet (“neighborhood”) for 'G' and German Durchschnitt (“intersection”) for the 'δ'.",
  "forms": [
    {
      "form": "G_δ",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol",
        "head": "G_δ"
      },
      "expansion": "G_δ",
      "name": "head"
    }
  ],
  "hypernyms": [
    {
      "word": "Borel set"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        "Translingual entries with incorrect language header",
        "Translingual entries with topic categories using raw markup",
        "Translingual lemmas",
        "Translingual symbols",
        "Translingual terms derived from German",
        "Translingual terms spelled with Δ",
        "Translingual terms written in multiple scripts",
        "mul:Mathematical analysis",
        "mul:Measure theory",
        "mul:Topology"
      ],
      "glosses": [
        "A countable intersection of open sets."
      ],
      "links": [
        [
          "mathematical analysis",
          "mathematical analysis"
        ],
        [
          "topology",
          "topology"
        ],
        [
          "countable",
          "countable"
        ],
        [
          "intersection",
          "intersection"
        ],
        [
          "open set",
          "open set"
        ]
      ],
      "raw_glosses": [
        "(mathematical analysis, topology) A countable intersection of open sets."
      ],
      "topics": [
        "mathematical-analysis",
        "mathematics",
        "sciences",
        "topology"
      ],
      "wikipedia": [
        "Gδ set"
      ]
    }
  ],
  "word": "Gδ"
}