"~" meaning in 中古法語

{
  "categories": [
    {
      "kind": "other",
      "name": "中古法語詞元",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "中古法語附加符號",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "有13個詞條的頁面",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "有詞條的頁面",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "中古法語",
  "lang_code": "frm",
  "pos": "character",
  "pos_title": "附加符號",
  "senses": [
    {
      "glosses": [
        "用於信件，寫在元音上，代替元音後的 n 或 m。"
      ],
      "id": "zh-~-frm-character-MVkPtMqn"
    }
  ],
  "tags": [
    "diacritic"
  ],
  "word": "~"
}

{
  "categories": [
    "中古法語詞元",
    "中古法語附加符號",
    "有13個詞條的頁面",
    "有詞條的頁面"
  ],
  "lang": "中古法語",
  "lang_code": "frm",
  "pos": "character",
  "pos_title": "附加符號",
  "senses": [
    {
      "glosses": [
        "用於信件，寫在元音上，代替元音後的 n 或 m。"
      ]
    }
  ],
  "tags": [
    "diacritic"
  ],
  "word": "~"
}