"ˣ" meaning in Finnish

{
  "etymology_text": "Often traced back to Suomen kielen äänne- ja muotorakenne (1983) by Finnish linguist Fred Karlsson.",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "symbol"
      },
      "expansion": "ˣ",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Finnish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Finnish symbols",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with raw sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fi",
          "name": "Linguistics",
          "orig": "fi:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "jäännöslopuke; represents the tendency for a morpheme to cause gemination (rajakahdennus) after it. Always appears at the end of a morpheme."
      ],
      "id": "en-ˣ-fi-symbol-l5y~Gf2C",
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "jäännöslopuke",
          "jäännöslopuke#Finnish"
        ],
        [
          "tendency for a morpheme to cause gemination",
          "Appendix:Finnish pronunciation#Final gemination"
        ],
        [
          "rajakahdennus",
          "rajakahdennus#Finnish"
        ]
      ],
      "raw_glosses": [
        "(linguistics) jäännöslopuke; represents the tendency for a morpheme to cause gemination (rajakahdennus) after it. Always appears at the end of a morpheme."
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ],
      "wikipedia": [
        "Fred Karlsson"
      ]
    }
  ],
  "word": "ˣ"
}

{
  "etymology_text": "Often traced back to Suomen kielen äänne- ja muotorakenne (1983) by Finnish linguist Fred Karlsson.",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "symbol"
      },
      "expansion": "ˣ",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        "Finnish entries with incorrect language header",
        "Finnish lemmas",
        "Finnish symbols",
        "Pages with raw sortkeys",
        "fi:Linguistics"
      ],
      "glosses": [
        "jäännöslopuke; represents the tendency for a morpheme to cause gemination (rajakahdennus) after it. Always appears at the end of a morpheme."
      ],
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "jäännöslopuke",
          "jäännöslopuke#Finnish"
        ],
        [
          "tendency for a morpheme to cause gemination",
          "Appendix:Finnish pronunciation#Final gemination"
        ],
        [
          "rajakahdennus",
          "rajakahdennus#Finnish"
        ]
      ],
      "raw_glosses": [
        "(linguistics) jäännöslopuke; represents the tendency for a morpheme to cause gemination (rajakahdennus) after it. Always appears at the end of a morpheme."
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ],
      "wikipedia": [
        "Fred Karlsson"
      ]
    }
  ],
  "word": "ˣ"
}