"40º" meaning in Portuguese

{
  "head_templates": [
    {
      "args": {
        "inv": "1"
      },
      "expansion": "40º (invariable)",
      "name": "pt-adj"
    }
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "quadragésimo"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Portuguese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of quadragésimo."
      ],
      "id": "en-40º-pt-adj-g7LvkPUP",
      "links": [
        [
          "quadragésimo",
          "quadragésimo#Portuguese"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "invariable"
      ]
    }
  ],
  "word": "40º"
}

{
  "head_templates": [
    {
      "args": {
        "inv": "1"
      },
      "expansion": "40º (invariable)",
      "name": "pt-adj"
    }
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "quadragésimo"
        }
      ],
      "categories": [
        "Portuguese abbreviations",
        "Portuguese adjectives",
        "Portuguese entries with incorrect language header",
        "Portuguese indeclinable adjectives",
        "Portuguese lemmas",
        "Portuguese terms spelled with numbers",
        "Portuguese terms spelled with º"
      ],
      "glosses": [
        "Abbreviation of quadragésimo."
      ],
      "links": [
        [
          "quadragésimo",
          "quadragésimo#Portuguese"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "invariable"
      ]
    }
  ],
  "word": "40º"
}