"4n" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Lemmes en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Par abréviation de quaternion."
  ],
  "forms": [
    {
      "form": "4ⁿ",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "4ⁿˢ",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "examples": [
        {
          "ref": "Joseph A. Dane, Abstractions of Evidence in the Study of Manuscripts and Early Printed Books, 2016",
          "text": "Collation. —Eight 4ⁿˢ and one 5ⁿ = 74 leaves, of which the Iˢᵗ and 74ᵗʰ are blank.\nThat is: \"eight quaternions and one quinternion, which makes 74 leaves in all, of which tne first and last are blank\". The language used by Blades is traditional and seems innocent: the words quaternion, quinternion, (abbreviated 4ⁿ, 5ⁿ) are the same words used in the concluding \"register\" of many early Italian printed books to describe the structure of those books."
        }
      ],
      "glosses": [
        "Abréviation de quaternion (huit feuilles, soit huit pages recto et huit pages verso)."
      ],
      "id": "fr-4n-en-noun-tEdy7uu1"
    }
  ],
  "word": "4n"
}

{
  "categories": [
    "Lemmes en anglais",
    "Noms communs en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Par abréviation de quaternion."
  ],
  "forms": [
    {
      "form": "4ⁿ",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "4ⁿˢ",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "examples": [
        {
          "ref": "Joseph A. Dane, Abstractions of Evidence in the Study of Manuscripts and Early Printed Books, 2016",
          "text": "Collation. —Eight 4ⁿˢ and one 5ⁿ = 74 leaves, of which the Iˢᵗ and 74ᵗʰ are blank.\nThat is: \"eight quaternions and one quinternion, which makes 74 leaves in all, of which tne first and last are blank\". The language used by Blades is traditional and seems innocent: the words quaternion, quinternion, (abbreviated 4ⁿ, 5ⁿ) are the same words used in the concluding \"register\" of many early Italian printed books to describe the structure of those books."
        }
      ],
      "glosses": [
        "Abréviation de quaternion (huit feuilles, soit huit pages recto et huit pages verso)."
      ]
    }
  ],
  "word": "4n"
}