"ff" meaning in Translingual

{
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "la",
        "3": "folio",
        "4": "",
        "5": "on the (next) page"
      },
      "expansion": "Latin folio (“on the (next) page”)",
      "name": "der"
    },
    {
      "args": {
        "1": "la",
        "2": "folium",
        "3": "",
        "4": "leaf, page"
      },
      "expansion": "folium (“leaf, page”)",
      "name": "m"
    }
  ],
  "etymology_text": "The \"and following\" sense is an abbreviation of Latin folio (“on the (next) page”), ablative of folium (“leaf, page”). The \"folios\" that follow can be pages, paragraphs, Bible verses, or other sections of written material.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "10": "",
        "2": "symbol",
        "3": "",
        "4": "",
        "5": "or",
        "6": "",
        "7": "or",
        "8": "",
        "9": "or",
        "cat2": "",
        "f1lang": "en",
        "f1nolink": "",
        "f2lang": "en",
        "f2nolink": "",
        "f3lang": "en",
        "f3nolink": "",
        "f4lang": "en",
        "f4nolink": "",
        "head": "",
        "head2": "",
        "head3": "",
        "head4": "",
        "sc": "Latn",
        "sort": ""
      },
      "expansion": "ff",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "ff",
      "name": "mul-symbol"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "glosses": [
        "fortissimo"
      ],
      "id": "en-ff-mul-symbol-8lEz-4k3",
      "links": [
        [
          "fortissimo",
          "fortissimo"
        ]
      ]
    },
    {
      "glosses": [
        "\"and following\" (pages, etc)"
      ],
      "id": "en-ff-mul-symbol-ap8k4Mji"
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "ISO 639-1",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "20 33 46",
          "kind": "other",
          "name": "Musical symbols",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "3 3 94",
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "4 4 91",
          "kind": "other",
          "name": "Translingual terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "ISO 639-1 language code for Fula."
      ],
      "id": "en-ff-mul-symbol-2gwYtNu9",
      "links": [
        [
          "language code",
          "language code"
        ]
      ],
      "qualifier": "international standards",
      "raw_glosses": [
        "(international standards) ISO 639-1 language code for Fula."
      ]
    }
  ],
  "word": "ff"
}

{
  "categories": [
    "Musical symbols",
    "Translingual entries with incorrect language header",
    "Translingual lemmas",
    "Translingual symbols",
    "Translingual terms derived from Latin",
    "Translingual terms with redundant script codes"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "la",
        "3": "folio",
        "4": "",
        "5": "on the (next) page"
      },
      "expansion": "Latin folio (“on the (next) page”)",
      "name": "der"
    },
    {
      "args": {
        "1": "la",
        "2": "folium",
        "3": "",
        "4": "leaf, page"
      },
      "expansion": "folium (“leaf, page”)",
      "name": "m"
    }
  ],
  "etymology_text": "The \"and following\" sense is an abbreviation of Latin folio (“on the (next) page”), ablative of folium (“leaf, page”). The \"folios\" that follow can be pages, paragraphs, Bible verses, or other sections of written material.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "10": "",
        "2": "symbol",
        "3": "",
        "4": "",
        "5": "or",
        "6": "",
        "7": "or",
        "8": "",
        "9": "or",
        "cat2": "",
        "f1lang": "en",
        "f1nolink": "",
        "f2lang": "en",
        "f2nolink": "",
        "f3lang": "en",
        "f3nolink": "",
        "f4lang": "en",
        "f4nolink": "",
        "head": "",
        "head2": "",
        "head3": "",
        "head4": "",
        "sc": "Latn",
        "sort": ""
      },
      "expansion": "ff",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "ff",
      "name": "mul-symbol"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "glosses": [
        "fortissimo"
      ],
      "links": [
        [
          "fortissimo",
          "fortissimo"
        ]
      ]
    },
    {
      "glosses": [
        "\"and following\" (pages, etc)"
      ]
    },
    {
      "categories": [
        "ISO 639-1"
      ],
      "glosses": [
        "ISO 639-1 language code for Fula."
      ],
      "links": [
        [
          "language code",
          "language code"
        ]
      ],
      "qualifier": "international standards",
      "raw_glosses": [
        "(international standards) ISO 639-1 language code for Fula."
      ]
    }
  ],
  "word": "ff"
}