"XC" meaning in Translingual

{
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "X",
        "3": "C",
        "t1": "10",
        "t2": "100"
      },
      "expansion": "X (“10”) + C (“100”)",
      "name": "compound"
    }
  ],
  "etymology_text": "Compound of the following Roman numerals: X (“10”) + C (“100”). This number is written in subtractive notation, indicating that X is subtracted from C; hence, C (100) minus X (10) is 90.",
  "forms": [
    {
      "form": "xc",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "LXXXX",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "lxxxx",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "numeral symbol",
        "cat2": "",
        "sc": "Latn",
        "sort": ""
      },
      "expansion": "XC",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "XC",
      "name": "mul-number"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual numeral symbols",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual terms with redundant script codes",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "5 26 69",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "4 25 71",
          "kind": "other",
          "name": "English words spelled without vowels",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "1 6 92",
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "1 6 93",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A Roman numeral representing the number ninety (90)."
      ],
      "id": "en-XC-mul-num-LbhuWxZl",
      "links": [
        [
          "Roman numeral",
          "Roman numeral#English"
        ],
        [
          "ninety",
          "ninety"
        ],
        [
          "90",
          "90"
        ]
      ],
      "raw_tags": [
        "number"
      ],
      "related": [
        {
          "english": "eighty-nine, 89",
          "sense": "Previous",
          "translation": "eighty-nine, 89",
          "word": "LXXXIX"
        },
        {
          "english": "ninety-one, 91",
          "sense": "Next",
          "translation": "ninety-one, 91",
          "word": "XCI"
        }
      ],
      "wikipedia": [
        "subtractive notation"
      ]
    }
  ],
  "word": "XC"
}

{
  "categories": [
    "English adjectives",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English uncomparable adjectives",
    "English uncountable nouns",
    "English words spelled without vowels",
    "Pages with 2 entries",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "X",
        "3": "C",
        "t1": "10",
        "t2": "100"
      },
      "expansion": "X (“10”) + C (“100”)",
      "name": "compound"
    }
  ],
  "etymology_text": "Compound of the following Roman numerals: X (“10”) + C (“100”). This number is written in subtractive notation, indicating that X is subtracted from C; hence, C (100) minus X (10) is 90.",
  "forms": [
    {
      "form": "xc",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "LXXXX",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "lxxxx",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "numeral symbol",
        "cat2": "",
        "sc": "Latn",
        "sort": ""
      },
      "expansion": "XC",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "XC",
      "name": "mul-number"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "num",
  "related": [
    {
      "english": "eighty-nine, 89",
      "sense": "Previous",
      "translation": "eighty-nine, 89",
      "word": "LXXXIX"
    },
    {
      "english": "ninety-one, 91",
      "sense": "Next",
      "translation": "ninety-one, 91",
      "word": "XCI"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 2 entries",
        "Pages with entries",
        "Roman numerals",
        "Translingual compound terms",
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual numeral symbols",
        "Translingual terms with redundant script codes"
      ],
      "glosses": [
        "A Roman numeral representing the number ninety (90)."
      ],
      "links": [
        [
          "Roman numeral",
          "Roman numeral#English"
        ],
        [
          "ninety",
          "ninety"
        ],
        [
          "90",
          "90"
        ]
      ],
      "raw_tags": [
        "number"
      ],
      "wikipedia": [
        "subtractive notation"
      ]
    }
  ],
  "word": "XC"
}