"Tert." meaning in Latin

{
  "head_templates": [
    {
      "args": {
        "1": "Tert.",
        "g": "m",
        "indecl": "1"
      },
      "expansion": "Tert. m (indeclinable)",
      "name": "la-proper noun"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Tertulliānus"
        }
      ],
      "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"
        }
      ],
      "examples": [
        {
          "text": "Tert. adv. Valent. [Tertulliānus adversus Valentīniānōs]\nTertullian against the Valentinians",
          "type": "example"
        }
      ],
      "glosses": [
        "Abbreviation of Tertulliānus."
      ],
      "id": "en-Tert.-la-name-2yWp-bAf",
      "links": [
        [
          "Tertulliānus",
          "Tertullianus#Latin"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "indeclinable",
        "masculine"
      ]
    }
  ],
  "word": "Tert."
}

{
  "head_templates": [
    {
      "args": {
        "1": "Tert.",
        "g": "m",
        "indecl": "1"
      },
      "expansion": "Tert. m (indeclinable)",
      "name": "la-proper noun"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Tertulliānus"
        }
      ],
      "categories": [
        "Latin abbreviations",
        "Latin entries with incorrect language header",
        "Latin indeclinable nouns",
        "Latin lemmas",
        "Latin masculine indeclinable nouns",
        "Latin masculine nouns",
        "Latin proper nouns",
        "Latin terms spelled with .",
        "Latin terms with usage examples",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Tert. adv. Valent. [Tertulliānus adversus Valentīniānōs]\nTertullian against the Valentinians",
          "type": "example"
        }
      ],
      "glosses": [
        "Abbreviation of Tertulliānus."
      ],
      "links": [
        [
          "Tertulliānus",
          "Tertullianus#Latin"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "indeclinable",
        "masculine"
      ]
    }
  ],
  "word": "Tert."
}