"nomen ambiguum" meaning in English

{
  "forms": [
    {
      "form": "nomina ambigua",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "nomina ambigua"
      },
      "expansion": "nomen ambiguum (plural nomina ambigua)",
      "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"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Taxonomy",
          "orig": "en:Taxonomy",
          "parents": [
            "Biology",
            "Evolutionary theory",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A name which has lost the ability to clearly identify a species because it has regularly been used by different authors to identify different species."
      ],
      "id": "en-nomen_ambiguum-en-noun-QGL3yDKH",
      "links": [
        [
          "taxonomy",
          "taxonomy"
        ],
        [
          "name",
          "name"
        ],
        [
          "identify",
          "identify"
        ],
        [
          "species",
          "species"
        ]
      ],
      "raw_glosses": [
        "(taxonomy) A name which has lost the ability to clearly identify a species because it has regularly been used by different authors to identify different species."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "taxonomy"
      ]
    }
  ],
  "word": "nomen ambiguum"
}

{
  "forms": [
    {
      "form": "nomina ambigua",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "nomina ambigua"
      },
      "expansion": "nomen ambiguum (plural nomina ambigua)",
      "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",
        "en:Taxonomy"
      ],
      "glosses": [
        "A name which has lost the ability to clearly identify a species because it has regularly been used by different authors to identify different species."
      ],
      "links": [
        [
          "taxonomy",
          "taxonomy"
        ],
        [
          "name",
          "name"
        ],
        [
          "identify",
          "identify"
        ],
        [
          "species",
          "species"
        ]
      ],
      "raw_glosses": [
        "(taxonomy) A name which has lost the ability to clearly identify a species because it has regularly been used by different authors to identify different species."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "taxonomy"
      ]
    }
  ],
  "word": "nomen ambiguum"
}