"mule bell" meaning in English

{
  "forms": [
    {
      "form": "mule bells",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mule bell (plural mule bells)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1850, John Greenleaf Whittier, Derne",
          "text": "The sounds of Moslem life are still; / No mule-bell tinkles down the hill; / Stretched in the broad court of the khan, / The dusty Bornou caravan / Lies heaped in slumber, beast and man […].",
          "type": "quotation"
        },
        {
          "ref": "1852, Washington Irving, Tales from the Alhambra",
          "text": "There is something wildly pleasing in listening to these ditties among the rude and lonely scenes that they illustrate, accompanied, as they are, by the occasional jingle of the mulebell.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A bell hung on a mule."
      ],
      "id": "en-mule_bell-en-noun-~vzoyzql",
      "links": [
        [
          "bell",
          "bell"
        ],
        [
          "mule",
          "mule"
        ]
      ],
      "synonyms": [
        {
          "word": "mulebell"
        }
      ]
    }
  ],
  "word": "mule bell"
}

{
  "forms": [
    {
      "form": "mule bells",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mule bell (plural mule bells)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1850, John Greenleaf Whittier, Derne",
          "text": "The sounds of Moslem life are still; / No mule-bell tinkles down the hill; / Stretched in the broad court of the khan, / The dusty Bornou caravan / Lies heaped in slumber, beast and man […].",
          "type": "quotation"
        },
        {
          "ref": "1852, Washington Irving, Tales from the Alhambra",
          "text": "There is something wildly pleasing in listening to these ditties among the rude and lonely scenes that they illustrate, accompanied, as they are, by the occasional jingle of the mulebell.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A bell hung on a mule."
      ],
      "links": [
        [
          "bell",
          "bell"
        ],
        [
          "mule",
          "mule"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "mulebell"
    }
  ],
  "word": "mule bell"
}