"頭文字" meaning in Japanese

{
  "forms": [
    {
      "form": "頭文字",
      "ruby": [
        [
          "頭",
          "かしら"
        ],
        [
          "文",
          "も"
        ],
        [
          "字",
          "じ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kashiramoji",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "かしらもじ"
      },
      "expansion": "頭(かしら)文(も)字(じ) • (kashiramoji)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "first letter or initial of a word or initials of words"
      ],
      "id": "en-頭文字-ja-noun-AhYhnBZZ",
      "links": [
        [
          "initial",
          "initial"
        ]
      ],
      "synonyms": [
        {
          "_dis1": "100 0",
          "roman": "inisharu",
          "sense": "initial",
          "word": "イニシャル"
        }
      ]
    },
    {
      "categories": [
        {
          "_dis": "13 87",
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "6 94",
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "24 76",
          "kind": "other",
          "name": "Japanese terms with 3 kanji",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "6 94",
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "18 82",
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "18 82",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "capital letter (in Latin, Cyrillic, Greek, Armenian scripts)"
      ],
      "id": "en-頭文字-ja-noun-7IlX7oeK",
      "links": [
        [
          "capital letter",
          "capital letter"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ka̠ɕiɾa̠mo̞ʑi]"
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "roman": "kyapitaru",
      "tags": [
        "letter",
        "uppercase"
      ],
      "word": "キャピタル"
    }
  ],
  "word": "頭文字"
}

{
  "categories": [
    "Japanese entries with incorrect language header",
    "Japanese lemmas",
    "Japanese links with redundant wikilinks",
    "Japanese nouns",
    "Japanese terms spelled with first grade kanji",
    "Japanese terms spelled with second grade kanji",
    "Japanese terms with 3 kanji",
    "Japanese terms with IPA pronunciation",
    "Japanese terms with IPA pronunciation missing pitch accent",
    "Japanese terms with redundant sortkeys",
    "Pages with 3 entries",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "頭文字",
      "ruby": [
        [
          "頭",
          "かしら"
        ],
        [
          "文",
          "も"
        ],
        [
          "字",
          "じ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kashiramoji",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "かしらもじ"
      },
      "expansion": "頭(かしら)文(も)字(じ) • (kashiramoji)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "first letter or initial of a word or initials of words"
      ],
      "links": [
        [
          "initial",
          "initial"
        ]
      ]
    },
    {
      "glosses": [
        "capital letter (in Latin, Cyrillic, Greek, Armenian scripts)"
      ],
      "links": [
        [
          "capital letter",
          "capital letter"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ka̠ɕiɾa̠mo̞ʑi]"
    }
  ],
  "synonyms": [
    {
      "roman": "inisharu",
      "sense": "initial",
      "word": "イニシャル"
    },
    {
      "roman": "kyapitaru",
      "tags": [
        "letter",
        "uppercase"
      ],
      "word": "キャピタル"
    }
  ],
  "word": "頭文字"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "頭文字"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "頭文字",
  "trace": ""
}