"n̄" meaning in Latin

{
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "adverb"
      },
      "expansion": "n̄",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin links with redundant target parameters",
          "parents": [
            "Links with redundant target parameters",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Medieval Latin",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Scribal abbreviation of nōn (“not”)."
      ],
      "id": "en-n̄-la-adv-W1d88Inh",
      "links": [
        [
          "nōn",
          "non#Latin"
        ]
      ],
      "raw_glosses": [
        "(Medieval Latin) Scribal abbreviation of nōn (“not”)."
      ],
      "tags": [
        "Medieval-Latin"
      ]
    }
  ],
  "word": "n̄"
}

{
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "adverb"
      },
      "expansion": "n̄",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Latin adverbs",
        "Latin entries with incorrect language header",
        "Latin lemmas",
        "Latin links with redundant target parameters",
        "Latin scribal abbreviations",
        "Latin terms spelled with ◌̄",
        "Medieval Latin"
      ],
      "glosses": [
        "Scribal abbreviation of nōn (“not”)."
      ],
      "links": [
        [
          "nōn",
          "non#Latin"
        ]
      ],
      "raw_glosses": [
        "(Medieval Latin) Scribal abbreviation of nōn (“not”)."
      ],
      "tags": [
        "Medieval-Latin"
      ]
    }
  ],
  "word": "n̄"
}