"zero" meaning in Ido

{
  "etymology_templates": [
    {
      "args": {
        "1": "io",
        "2": "en",
        "3": "zero"
      },
      "expansion": "English zero",
      "name": "bor"
    },
    {
      "args": {
        "1": "io",
        "2": "fr",
        "3": "zéro"
      },
      "expansion": "French zéro",
      "name": "bor"
    },
    {
      "args": {
        "1": "io",
        "2": "it",
        "3": "zero"
      },
      "expansion": "Italian zero",
      "name": "bor"
    },
    {
      "args": {
        "1": "io",
        "2": "es",
        "3": "cero"
      },
      "expansion": "Spanish cero",
      "name": "bor"
    },
    {
      "args": {
        "1": "zero",
        "2": "zéro",
        "3": "",
        "4": "zero",
        "5": "",
        "6": "cero"
      },
      "expansion": "Borrowed from English zero, French zéro, Italian zero, Spanish cero.",
      "name": "io-bor"
    }
  ],
  "etymology_text": "Borrowed from English zero, French zéro, Italian zero, Spanish cero.",
  "head_templates": [
    {
      "args": {
        "1": "io",
        "2": "numerals"
      },
      "expansion": "zero",
      "name": "head"
    }
  ],
  "lang": "Ido",
  "lang_code": "io",
  "pos": "num",
  "senses": [
    {
      "glosses": [
        "zero"
      ],
      "id": "en-zero-io-num--RlOc~np",
      "links": [
        [
          "zero",
          "zero#English"
        ]
      ],
      "raw_glosses": [
        "(temperature) zero"
      ],
      "topics": [
        "temperature"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "io",
          "name": "Arithmetic",
          "orig": "io:Arithmetic",
          "parents": [
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Ido entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "topical",
          "name": "Ido cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "cipher, nought"
      ],
      "id": "en-zero-io-num-4woJjztH",
      "links": [
        [
          "arithmetic",
          "arithmetic"
        ],
        [
          "cipher",
          "cipher#English"
        ],
        [
          "nought",
          "nought#English"
        ]
      ],
      "raw_glosses": [
        "(arithmetic) cipher, nought"
      ],
      "topics": [
        "arithmetic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈze.ro/"
    }
  ],
  "word": "zero"
}

{
  "categories": [
    "Ido cardinal numbers",
    "Ido entries with incorrect language header",
    "Ido lemmas",
    "Ido numerals",
    "Ido terms borrowed from English",
    "Ido terms borrowed from French",
    "Ido terms borrowed from Italian",
    "Ido terms borrowed from Spanish",
    "Ido terms derived from English",
    "Ido terms derived from French",
    "Ido terms derived from Italian",
    "Ido terms derived from Spanish",
    "Pages with 14 entries",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "io",
        "2": "en",
        "3": "zero"
      },
      "expansion": "English zero",
      "name": "bor"
    },
    {
      "args": {
        "1": "io",
        "2": "fr",
        "3": "zéro"
      },
      "expansion": "French zéro",
      "name": "bor"
    },
    {
      "args": {
        "1": "io",
        "2": "it",
        "3": "zero"
      },
      "expansion": "Italian zero",
      "name": "bor"
    },
    {
      "args": {
        "1": "io",
        "2": "es",
        "3": "cero"
      },
      "expansion": "Spanish cero",
      "name": "bor"
    },
    {
      "args": {
        "1": "zero",
        "2": "zéro",
        "3": "",
        "4": "zero",
        "5": "",
        "6": "cero"
      },
      "expansion": "Borrowed from English zero, French zéro, Italian zero, Spanish cero.",
      "name": "io-bor"
    }
  ],
  "etymology_text": "Borrowed from English zero, French zéro, Italian zero, Spanish cero.",
  "head_templates": [
    {
      "args": {
        "1": "io",
        "2": "numerals"
      },
      "expansion": "zero",
      "name": "head"
    }
  ],
  "lang": "Ido",
  "lang_code": "io",
  "pos": "num",
  "senses": [
    {
      "glosses": [
        "zero"
      ],
      "links": [
        [
          "zero",
          "zero#English"
        ]
      ],
      "raw_glosses": [
        "(temperature) zero"
      ],
      "topics": [
        "temperature"
      ]
    },
    {
      "categories": [
        "io:Arithmetic"
      ],
      "glosses": [
        "cipher, nought"
      ],
      "links": [
        [
          "arithmetic",
          "arithmetic"
        ],
        [
          "cipher",
          "cipher#English"
        ],
        [
          "nought",
          "nought#English"
        ]
      ],
      "raw_glosses": [
        "(arithmetic) cipher, nought"
      ],
      "topics": [
        "arithmetic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈze.ro/"
    }
  ],
  "word": "zero"
}