"ready-reckoner" meaning in English

{
  "forms": [
    {
      "form": "ready-reckoners",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "ready-reckoner (plural ready-reckoners)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "ready reckoner"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
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          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1890, Mary Elizabeth Braddon, chapter 4, in The Trail of the Serpent, Book the Sixth:",
          "text": "Besides these things, Mr. Peters found a Johnson's dictionary, a ready-reckoner, and a pair of boot-hooks; but as he found nothing else, Mr. Darley grew quite tired of watching his proceedings, and suggested that they should adjourn; for he remarked—\"Is it likely that such a fellow as this North would leave anything behind him?\"",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative spelling of ready reckoner"
      ],
      "id": "en-ready-reckoner-en-noun-Wo9jk5rg",
      "links": [
        [
          "ready reckoner",
          "ready reckoner#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
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    }
  ],
  "word": "ready-reckoner"
}

{
  "forms": [
    {
      "form": "ready-reckoners",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "ready-reckoner (plural ready-reckoners)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "ready reckoner"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1890, Mary Elizabeth Braddon, chapter 4, in The Trail of the Serpent, Book the Sixth:",
          "text": "Besides these things, Mr. Peters found a Johnson's dictionary, a ready-reckoner, and a pair of boot-hooks; but as he found nothing else, Mr. Darley grew quite tired of watching his proceedings, and suggested that they should adjourn; for he remarked—\"Is it likely that such a fellow as this North would leave anything behind him?\"",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative spelling of ready reckoner"
      ],
      "links": [
        [
          "ready reckoner",
          "ready reckoner#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "ready-reckoner"
}