"crossstaff" meaning in English

{
  "forms": [
    {
      "form": "crossstaffs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crossstaff (plural crossstaffs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "cross-staff"
        }
      ],
      "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 with 3 consecutive instances of the same letter",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
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          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1980, Per Sörbom, Tekniska museet (Stockholm, Sweden), Transport Technology and Social Change: Symposium 1979, pages 124 and 133",
          "text": "Yet even with these corrections, Harriot was not satisfied with the crossstaff as currently made. … To take a precise navigational sighting using a crossstaff it is necessary to look two ways at once—at the sun, for instance, and at the horizon. … The National Maritime Museum at Greenwich has 1 crossstaff, 15 backstaffs, and 98 octants; the Peabody Museum at Salem, Massachusetts has 2 crossstaffs, 11 backstaffs, and 82 octants."
        },
        {
          "ref": "2001, Meredith P. Lillich, Studies in Medieval Stained Glass and Monasticism, pages 253 and 443:",
          "text": "Several archbishops holding such crossstaffs appear in the Reims nave.\n[…]\nIn one [scene] an enthroned archbishop with crossstaff and moneybags presented a gold piece, as down payment, to architects and master mascons dressed in medieval chaperons.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of cross-staff"
      ],
      "id": "en-crossstaff-en-noun-J2kgiKY1",
      "links": [
        [
          "cross-staff",
          "cross-staff#English"
        ]
      ],
      "raw_glosses": [
        "(rare) Alternative form of cross-staff"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "rare"
      ]
    }
  ],
  "word": "crossstaff"
}

{
  "forms": [
    {
      "form": "crossstaffs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crossstaff (plural crossstaffs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "cross-staff"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with 3 consecutive instances of the same letter",
        "English terms with quotations",
        "English terms with rare senses",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1980, Per Sörbom, Tekniska museet (Stockholm, Sweden), Transport Technology and Social Change: Symposium 1979, pages 124 and 133",
          "text": "Yet even with these corrections, Harriot was not satisfied with the crossstaff as currently made. … To take a precise navigational sighting using a crossstaff it is necessary to look two ways at once—at the sun, for instance, and at the horizon. … The National Maritime Museum at Greenwich has 1 crossstaff, 15 backstaffs, and 98 octants; the Peabody Museum at Salem, Massachusetts has 2 crossstaffs, 11 backstaffs, and 82 octants."
        },
        {
          "ref": "2001, Meredith P. Lillich, Studies in Medieval Stained Glass and Monasticism, pages 253 and 443:",
          "text": "Several archbishops holding such crossstaffs appear in the Reims nave.\n[…]\nIn one [scene] an enthroned archbishop with crossstaff and moneybags presented a gold piece, as down payment, to architects and master mascons dressed in medieval chaperons.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of cross-staff"
      ],
      "links": [
        [
          "cross-staff",
          "cross-staff#English"
        ]
      ],
      "raw_glosses": [
        "(rare) Alternative form of cross-staff"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "rare"
      ]
    }
  ],
  "word": "crossstaff"
}