"vesper mouse" meaning in English

{
  "forms": [
    {
      "form": "vesper mice",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "vesper mice"
      },
      "expansion": "vesper mouse (plural vesper mice)",
      "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"
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          "source": "w"
        },
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        },
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          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Cricetids",
          "orig": "en:Cricetids",
          "parents": [
            "Rodents",
            "Mammals",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Any rodent of the genus Calomys."
      ],
      "id": "en-vesper_mouse-en-noun-65uKBo2U",
      "links": [
        [
          "rodent",
          "rodent"
        ],
        [
          "genus",
          "genus"
        ]
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "rodent of the genus Calomys",
          "word": "iltahiiru"
        }
      ]
    }
  ],
  "word": "vesper mouse"
}

{
  "forms": [
    {
      "form": "vesper mice",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "vesper mice"
      },
      "expansion": "vesper mouse (plural vesper mice)",
      "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",
        "Entries using missing taxonomic name (genus)",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "en:Cricetids"
      ],
      "glosses": [
        "Any rodent of the genus Calomys."
      ],
      "links": [
        [
          "rodent",
          "rodent"
        ],
        [
          "genus",
          "genus"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "rodent of the genus Calomys",
      "word": "iltahiiru"
    }
  ],
  "word": "vesper mouse"
}