"SOS" meaning in Translingual

{
  "etymology_number": 1,
  "etymology_text": "Chosen because its Morse code sequence (...---...) was easy to remember and recognize even through interference. Many mnemonics and backronyms were later formed from the sequence.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "SOS",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "glosses": [
        "emergency, mayday, distress"
      ],
      "id": "en-SOS-mul-symbol-G-3W0GjF",
      "links": [
        [
          "emergency",
          "emergency"
        ],
        [
          "mayday",
          "mayday"
        ],
        [
          "distress",
          "distress"
        ]
      ],
      "related": [
        {
          "word": "pan-pan"
        }
      ],
      "synonyms": [
        {
          "word": "CQD"
        },
        {
          "word": "mayday"
        }
      ]
    }
  ],
  "sounds": [],
  "word": "SOS"
}

{
  "etymology_number": 2,
  "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": "SOS",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "SOS",
      "name": "mul-symbol"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "ISO 4217",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Currency",
          "orig": "mul:Currency",
          "parents": [
            "Money",
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "43 57",
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "28 72",
          "kind": "other",
          "name": "Translingual terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "ISO 4217 currency code for the Somali shilling."
      ],
      "id": "en-SOS-mul-symbol-i~lyfcic",
      "links": [
        [
          "currency code",
          "currency code"
        ]
      ],
      "qualifier": "international standards",
      "raw_glosses": [
        "(international standards) ISO 4217 currency code for the Somali shilling."
      ]
    }
  ],
  "sounds": [],
  "word": "SOS"
}

{
  "categories": [
    "English terms with IPA pronunciation",
    "Requests for gender in Swedish entries",
    "Translingual entries with incorrect language header",
    "Translingual lemmas",
    "Translingual palindromes",
    "Translingual symbols",
    "Translingual terms with redundant script codes"
  ],
  "etymology_number": 1,
  "etymology_text": "Chosen because its Morse code sequence (...---...) was easy to remember and recognize even through interference. Many mnemonics and backronyms were later formed from the sequence.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "SOS",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "related": [
    {
      "word": "pan-pan"
    }
  ],
  "senses": [
    {
      "glosses": [
        "emergency, mayday, distress"
      ],
      "links": [
        [
          "emergency",
          "emergency"
        ],
        [
          "mayday",
          "mayday"
        ],
        [
          "distress",
          "distress"
        ]
      ]
    }
  ],
  "sounds": [],
  "synonyms": [
    {
      "word": "CQD"
    },
    {
      "word": "mayday"
    }
  ],
  "word": "SOS"
}

{
  "categories": [
    "English terms with IPA pronunciation",
    "Requests for gender in Swedish entries",
    "Translingual entries with incorrect language header",
    "Translingual lemmas",
    "Translingual palindromes",
    "Translingual symbols",
    "Translingual terms with redundant script codes"
  ],
  "etymology_number": 2,
  "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": "SOS",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "SOS",
      "name": "mul-symbol"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        "ISO 4217",
        "mul:Currency"
      ],
      "glosses": [
        "ISO 4217 currency code for the Somali shilling."
      ],
      "links": [
        [
          "currency code",
          "currency code"
        ]
      ],
      "qualifier": "international standards",
      "raw_glosses": [
        "(international standards) ISO 4217 currency code for the Somali shilling."
      ]
    }
  ],
  "sounds": [],
  "word": "SOS"
}