"M.ª" meaning in Spanish

{
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "proper noun",
        "g": "f"
      },
      "expansion": "M.ª f",
      "name": "head"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "given name",
          "word": "María"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Spanish female given names",
          "parents": [
            "Female given names",
            "Given names",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of María (given name)"
      ],
      "id": "en-M.ª-es-name-LR-yVLv-",
      "links": [
        [
          "María",
          "María#Spanish"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "feminine"
      ]
    }
  ],
  "word": "M.ª"
}

{
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "proper noun",
        "g": "f"
      },
      "expansion": "M.ª f",
      "name": "head"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "given name",
          "word": "María"
        }
      ],
      "categories": [
        "Spanish abbreviations",
        "Spanish entries with incorrect language header",
        "Spanish female given names",
        "Spanish feminine nouns",
        "Spanish lemmas",
        "Spanish links with redundant wikilinks",
        "Spanish proper nouns",
        "Spanish terms spelled with .",
        "Spanish terms spelled with ª"
      ],
      "glosses": [
        "Abbreviation of María (given name)"
      ],
      "links": [
        [
          "María",
          "María#Spanish"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "feminine"
      ]
    }
  ],
  "word": "M.ª"
}