"auct." meaning in Latin

{
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "noun form"
      },
      "expansion": "auct.",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "of authors",
          "word": "auctōrum"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of auctōrum; of authors."
      ],
      "id": "en-auct.-la-noun-fg-dB8Dj",
      "links": [
        [
          "auctōrum",
          "auctorum#Latin"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "auct."
}

{
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "noun form"
      },
      "expansion": "auct.",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "of authors",
          "word": "auctōrum"
        }
      ],
      "categories": [
        "Latin abbreviations",
        "Latin entries with incorrect language header",
        "Latin non-lemma forms",
        "Latin noun forms",
        "Latin terms spelled with .",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Abbreviation of auctōrum; of authors."
      ],
      "links": [
        [
          "auctōrum",
          "auctorum#Latin"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "auct."
}