"˜" meaning in Translingual

{
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "˜",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "IPA symbols",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "an oscillating tone, such as rising–falling–rising."
      ],
      "id": "en-˜-mul-symbol-WwS3Zp8K",
      "links": [
        [
          "tone",
          "tone"
        ]
      ],
      "raw_glosses": [
        "(IPA, dated) an oscillating tone, such as rising–falling–rising."
      ],
      "related": [
        {
          "alt": "a low rising–falling–rising tone",
          "word": "˷"
        }
      ],
      "tags": [
        "IPA",
        "dated"
      ],
      "wikipedia": [
        "Chao tone letters"
      ]
    }
  ],
  "word": "˜"
}

{
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "˜",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "related": [
    {
      "alt": "a low rising–falling–rising tone",
      "word": "˷"
    }
  ],
  "senses": [
    {
      "categories": [
        "IPA symbols",
        "Translingual dated terms",
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual symbols"
      ],
      "glosses": [
        "an oscillating tone, such as rising–falling–rising."
      ],
      "links": [
        [
          "tone",
          "tone"
        ]
      ],
      "raw_glosses": [
        "(IPA, dated) an oscillating tone, such as rising–falling–rising."
      ],
      "tags": [
        "IPA",
        "dated"
      ],
      "wikipedia": [
        "Chao tone letters"
      ]
    }
  ],
  "word": "˜"
}