"missummation" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mis",
        "3": "summation"
      },
      "expansion": "mis- + summation",
      "name": "prefix"
    }
  ],
  "etymology_text": "From mis- + summation.",
  "forms": [
    {
      "form": "missummations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "missummation (plural missummations)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with mis-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1817 December 31 (indicated as 1818), [Walter Scott], Rob Roy. […], volume (please specify |volume=I to III), Edinburgh: […] James Ballantyne and Co. for Archibald Constable and Co. […]; London: Longman, Hurst, Rees, Orme, and Brown, →OCLC:",
          "text": "An inroad on the strongbox, or an erasure in the ledger, or a missummation in a fitted account, could hardly have surprised him more disagreeably.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Wrong summation; incorrect addition."
      ],
      "id": "en-missummation-en-noun-oGTo2mE6",
      "links": [
        [
          "summation",
          "summation"
        ],
        [
          "addition",
          "addition"
        ]
      ],
      "raw_glosses": [
        "(archaic) Wrong summation; incorrect addition."
      ],
      "synonyms": [
        {
          "word": "misaddition"
        }
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "word": "missummation"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mis",
        "3": "summation"
      },
      "expansion": "mis- + summation",
      "name": "prefix"
    }
  ],
  "etymology_text": "From mis- + summation.",
  "forms": [
    {
      "form": "missummations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "missummation (plural missummations)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with mis-",
        "English terms with archaic senses",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1817 December 31 (indicated as 1818), [Walter Scott], Rob Roy. […], volume (please specify |volume=I to III), Edinburgh: […] James Ballantyne and Co. for Archibald Constable and Co. […]; London: Longman, Hurst, Rees, Orme, and Brown, →OCLC:",
          "text": "An inroad on the strongbox, or an erasure in the ledger, or a missummation in a fitted account, could hardly have surprised him more disagreeably.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Wrong summation; incorrect addition."
      ],
      "links": [
        [
          "summation",
          "summation"
        ],
        [
          "addition",
          "addition"
        ]
      ],
      "raw_glosses": [
        "(archaic) Wrong summation; incorrect addition."
      ],
      "synonyms": [
        {
          "word": "misaddition"
        }
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "word": "missummation"
}